Questions on Algebra: Quadratic Equation answered by real tutors!

Algebra ->  Quadratic Equations and Parabolas  -> Quadratic Equations Lessons  -> Quadratic Equation Lesson -> Questions on Algebra: Quadratic Equation answered by real tutors!      Log On


   



Tutors Answer Your Questions about Quadratic Equations (FREE)


Question 103792: My question is if the vertex of f(x)=-x^2+bx+8 has y-coordinate 17 and is in the second quadrant, find b.
Click here to see answer by edjones(8007) About Me 

Question 103811: Hello Tutors,
For some reason I can not figure these things out! I know that the Quadratic Formula is:
x = -bą√b2 – 4ac / 2a
But I can't get plugging the problem x^2 - 3x = 7x -2 into the formula and solve. Can someone please help?????
Further directions from my professor are as follows:
Make sure that your work is demonstrating the solving method given in the instructions. Use the Insert and Symbols menus in Word to present the radical √ and plus/minus ą symbols. Remember that radicands must be enclosed within [ ]. Typing your work vertically is preferred but optional. If you choose to type horizontally, make sure you are appropriately using grouping symbols.

Click here to see answer by ptaylor(2198) About Me 

Question 103833: square root 7x+29=x+3
Click here to see answer by jim_thompson5910(35256) About Me 

Question 103815: Hello Tutors,
Here is another Quadratic formula problem I seriously need your help on.
Directions from the Professor are as follows;
Make sure that your work is demonstrating the solving method given in the instructions. Use the Insert and Symbols menus in Word to present the radical √ and plus/minus ą symbols. Remember that radicands must be enclosed within [ ]. Typing your work vertically is preferred but optional. If you choose to type horizontally, make sure you are appropriately using grouping symbols.
Here is the Problem:
Solve by using the Quadratic Formula;
x^2 - 7x - 1 + -7 Thank You!

Click here to see answer by jim_thompson5910(35256) About Me 

Question 103812: Hello Tutors,
For some reason I can not figure these things out! I know that the Quadratic Formula is:
x = -bą√b2 – 4ac / 2a
But I can't get plugging the problem x^2 - 3x = 7x -2 into the formula and solve. Can someone please help?????
Further directions from my professor are as follows:
Make sure that your work is demonstrating the solving method given in the instructions. Use the Insert and Symbols menus in Word to present the radical √ and plus/minus ą symbols. Remember that radicands must be enclosed within [ ]. Typing your work vertically is preferred but optional. If you choose to type horizontally, make sure you are appropriately using grouping symbols.

Click here to see answer by jim_thompson5910(35256) About Me 

Question 103813: Let me try this again as I did not recieve the normal confirmation page that this was sent to the wonderful tutors here.
Directions from my Professor are as follows:
Make sure that your work is demonstrating the solving method given in the instructions. Use the Insert and Symbols menus in Word to present the radical √ and plus/minus ą symbols. Remember that radicands must be enclosed within [ ]. Typing your work vertically is preferred but optional. If you choose to type horizontally, make sure you are appropriately using grouping symbols.
On Pg: 583 of our textbook it shows the quadratic formula. But I somehow am messing up to the point I am so confused I don't know where to begin.
Here is the Problem:
Solve by using the Quadratic Formula;
x^2 - 3x = 7x - 2 Thank You!

Click here to see answer by jim_thompson5910(35256) About Me 

Question 103658: Solve by completing the square. 2x^2 – 6x – 3 = 0
Click here to see answer by ankor@dixie-net.com(22740) About Me 
Question 103658: Solve by completing the square. 2x^2 – 6x – 3 = 0
Click here to see answer by jim_thompson5910(35256) About Me 

Question 103806: My question is given the equation s=-16t^2+initial velocity x t+initial height, a rocket is fired upward from ground level with an initial velocity of 1600 feet/sec. When does the rocket reach its maximum height and how high is it at that time?
Click here to see answer by stanbon(75887) About Me 

Question 103931: Can someone Please, Please, Please help me solve tis problem by using the Quadratic Formula! I am desperite! Thank You!
Solve by Using the Quadratic Formula:
x^2 - 7x - 1= -7

Click here to see answer by jim_thompson5910(35256) About Me 
Question 103931: Can someone Please, Please, Please help me solve tis problem by using the Quadratic Formula! I am desperite! Thank You!
Solve by Using the Quadratic Formula:
x^2 - 7x - 1= -7

Click here to see answer by JP(22) About Me 

Question 103947: Tutor,
I was wondering if you could help me with this problem?
Find the equation and identify the axis of symmetry, create a suitable table for values, and graph.
y = x^2 - 5x + 3
I am not sure how to solve this problem I think I am making a mistake somewhere along the line. If you could help I would appreciate it. Thanks.

Click here to see answer by stanbon(75887) About Me 

Question 103942: what values for x must be excluded in the following fraction
7 over
x-9
a. 0
b. -9
c. 9
d. none

Click here to see answer by doukungfoo(195) About Me 
Question 103942: what values for x must be excluded in the following fraction
7 over
x-9
a. 0
b. -9
c. 9
d. none

Click here to see answer by jim_thompson5910(35256) About Me 

Question 103981: Could some one please help me solve this equation.
6x%5E2%2B7x=7

Click here to see answer by jim_thompson5910(35256) About Me 

Question 104025: I am stuck on this word problem would you be able to help me work it out?
A ball is thrown upward from the roof of a building 100 m tall with an initial velocity of 20 m/s. When will the ball reach a height of 80 m?
This problem has me confused I am not sure where to begin. Thanks for your help.

Click here to see answer by ankor@dixie-net.com(22740) About Me 

Question 104059: Is the following trinomial a perfect square?
x^2 + 18x + 81

Click here to see answer by scott8148(6628) About Me 

Question 104058: Find the x-intercepts.
y = x^2 + 5x + 2

Click here to see answer by HyperBrain(694) About Me 

Question 104057: Solve by completing the square.
x^2 = 5x + 2

Click here to see answer by HyperBrain(694) About Me 

Question 104056: Solve. x^2 + 7x – 1 = 0
Click here to see answer by HyperBrain(694) About Me 

Question 104063: Q.Solve for x


(b-c)x^2 + (c-a)x + (a-b)= 0

Click here to see answer by stanbon(75887) About Me 
Question 104063: Q.Solve for x


(b-c)x^2 + (c-a)x + (a-b)= 0

Click here to see answer by HyperBrain(694) About Me 

Question 104023: Tutor,
I have one last problem and I am having difficulty getting the answer. I think I am wrong on the negatives and possitives. My graph does not look right.
Indetify the axis of symmetry and create a table of values and graph.
y= -x^2 + 6x - 2
My answer does not look right to me could you please help me with this? Thank you in advance.

Click here to see answer by stanbon(75887) About Me 

Question 104066: A=1/2h for h
Click here to see answer by stanbon(75887) About Me 

Question 104070: Find the axis of symmetry.
y = x^2 + 5x – 7

Click here to see answer by stanbon(75887) About Me 

Question 104074: Solve by completing the square.
x^2 + 2x – 8 = 0

Click here to see answer by jim_thompson5910(35256) About Me 

Question 104072: Solve 5(x – 2)^2 = 3
Click here to see answer by jim_thompson5910(35256) About Me 

Question 104075: Solve by using the quadratic formula. x^2 = –5x – 5
Click here to see answer by jim_thompson5910(35256) About Me 

Question 104104: Solve (x + 5)^2 = 3
Click here to see answer by jim_thompson5910(35256) About Me 

Question 104102: Solve 5(x – 2)^2 = 3
Click here to see answer by jim_thompson5910(35256) About Me 

Question 104101: Solve by using the quadratic formula x^2 = –5x – 5
Click here to see answer by jim_thompson5910(35256) About Me 

Question 104055: Solve by using the quadratic formula. x^2 = –5x – 5
Click here to see answer by edjones(8007) About Me 

Question 104071: Solve (x + 5)^2 = 3
Click here to see answer by HyperBrain(694) About Me 

Question 104052: Solve for (x + 5)^2 = 3
Click here to see answer by ankor@dixie-net.com(22740) About Me 

Question 104371: Tutor,
If I could bother you for some help solving this problem I would appreciate it.
Find the x intercepts:
y = x^2 + x - 6
Thank you.

Click here to see answer by stanbon(75887) About Me 

Question 104390: Tutor,
Could you help me with this problem?
The demand equation for a certain type of printer is given by
D= -200p + 35,000
The supply equation is predicted to be
S= -p^2 + 400p - 20,000
Find the equilibrim price.
Thank you for your help.

Click here to see answer by stanbon(75887) About Me 

Question 104373: How do you solve y=(x-3)squared.
Click here to see answer by jim_thompson5910(35256) About Me 

Question 104365: Solve by using the quadratic formula 5x^2 + x = 3
Click here to see answer by jim_thompson5910(35256) About Me 

Question 103452: f(x)=-3(x-2)^ +5
a) state the direction of opening, the vertex, and the axis of symmetry
b) state the domain and range
c) graph the function
please help me solve these,
thank you

Click here to see answer by btifgurl(1) About Me 

Question 104542: Solve by completing the square.
x^2 – 16x + 63 = 0

Click here to see answer by edjones(8007) About Me 
Question 104542: Solve by completing the square.
x^2 – 16x + 63 = 0

Click here to see answer by Fombitz(32388) About Me 

Question 104539: Find the x-intercepts.
y = x^2 + 3x + 1

Click here to see answer by edjones(8007) About Me 

Question 104537: Find the axis of symmetry.
y = x^2 + x – 3

Click here to see answer by stanbon(75887) About Me 

Question 104634: solve the following equation for x
(x+4)^2=81

Click here to see answer by jim_thompson5910(35256) About Me 

Question 104637: solve the following equation for x
7x^2-15X+5=3

Click here to see answer by jim_thompson5910(35256) About Me 

Older solutions: 1..45, 46..90, 91..135, 136..180, 181..225, 226..270, 271..315, 316..360, 361..405, 406..450, 451..495, 496..540, 541..585, 586..630, 631..675, 676..720, 721..765, 766..810, 811..855, 856..900, 901..945, 946..990, 991..1035, 1036..1080, 1081..1125, 1126..1170, 1171..1215, 1216..1260, 1261..1305, 1306..1350, 1351..1395, 1396..1440, 1441..1485, 1486..1530, 1531..1575, 1576..1620, 1621..1665, 1666..1710, 1711..1755, 1756..1800, 1801..1845, 1846..1890, 1891..1935, 1936..1980, 1981..2025, 2026..2070, 2071..2115, 2116..2160, 2161..2205, 2206..2250, 2251..2295, 2296..2340, 2341..2385, 2386..2430, 2431..2475, 2476..2520, 2521..2565, 2566..2610, 2611..2655, 2656..2700, 2701..2745, 2746..2790, 2791..2835, 2836..2880, 2881..2925, 2926..2970, 2971..3015, 3016..3060, 3061..3105, 3106..3150, 3151..3195, 3196..3240, 3241..3285, 3286..3330, 3331..3375, 3376..3420, 3421..3465, 3466..3510, 3511..3555, 3556..3600, 3601..3645, 3646..3690, 3691..3735, 3736..3780, 3781..3825, 3826..3870, 3871..3915, 3916..3960, 3961..4005, 4006..4050, 4051..4095, 4096..4140, 4141..4185, 4186..4230, 4231..4275, 4276..4320, 4321..4365, 4366..4410, 4411..4455, 4456..4500, 4501..4545, 4546..4590, 4591..4635, 4636..4680, 4681..4725, 4726..4770, 4771..4815, 4816..4860, 4861..4905, 4906..4950, 4951..4995, 4996..5040, 5041..5085, 5086..5130, 5131..5175, 5176..5220, 5221..5265, 5266..5310, 5311..5355, 5356..5400, 5401..5445, 5446..5490, 5491..5535, 5536..5580, 5581..5625, 5626..5670, 5671..5715, 5716..5760, 5761..5805, 5806..5850, 5851..5895, 5896..5940, 5941..5985, 5986..6030, 6031..6075, 6076..6120, 6121..6165, 6166..6210, 6211..6255, 6256..6300, 6301..6345, 6346..6390, 6391..6435, 6436..6480, 6481..6525, 6526..6570, 6571..6615, 6616..6660, 6661..6705, 6706..6750, 6751..6795, 6796..6840, 6841..6885, 6886..6930, 6931..6975, 6976..7020, 7021..7065, 7066..7110, 7111..7155, 7156..7200, 7201..7245, 7246..7290, 7291..7335, 7336..7380, 7381..7425, 7426..7470, 7471..7515, 7516..7560, 7561..7605, 7606..7650, 7651..7695, 7696..7740, 7741..7785, 7786..7830, 7831..7875, 7876..7920, 7921..7965, 7966..8010, 8011..8055, 8056..8100, 8101..8145, 8146..8190, 8191..8235, 8236..8280, 8281..8325, 8326..8370, 8371..8415, 8416..8460, 8461..8505, 8506..8550, 8551..8595, 8596..8640, 8641..8685, 8686..8730, 8731..8775, 8776..8820, 8821..8865, 8866..8910, 8911..8955, 8956..9000, 9001..9045, 9046..9090, 9091..9135, 9136..9180, 9181..9225, 9226..9270, 9271..9315, 9316..9360, 9361..9405, 9406..9450, 9451..9495, 9496..9540, 9541..9585, 9586..9630, 9631..9675, 9676..9720, 9721..9765, 9766..9810, 9811..9855, 9856..9900, 9901..9945, 9946..9990, 9991..10035, 10036..10080, 10081..10125, 10126..10170, 10171..10215, 10216..10260, 10261..10305, 10306..10350, 10351..10395, 10396..10440, 10441..10485, 10486..10530, 10531..10575, 10576..10620, 10621..10665, 10666..10710, 10711..10755, 10756..10800, 10801..10845, 10846..10890, 10891..10935, 10936..10980, 10981..11025, 11026..11070, 11071..11115, 11116..11160, 11161..11205, 11206..11250, 11251..11295, 11296..11340, 11341..11385, 11386..11430, 11431..11475, 11476..11520, 11521..11565, 11566..11610, 11611..11655, 11656..11700, 11701..11745, 11746..11790, 11791..11835, 11836..11880, 11881..11925, 11926..11970, 11971..12015, 12016..12060, 12061..12105, 12106..12150, 12151..12195, 12196..12240, 12241..12285, 12286..12330, 12331..12375, 12376..12420, 12421..12465, 12466..12510, 12511..12555, 12556..12600, 12601..12645, 12646..12690, 12691..12735, 12736..12780, 12781..12825, 12826..12870, 12871..12915, 12916..12960, 12961..13005, 13006..13050, 13051..13095, 13096..13140, 13141..13185, 13186..13230, 13231..13275, 13276..13320, 13321..13365, 13366..13410, 13411..13455, 13456..13500, 13501..13545, 13546..13590, 13591..13635, 13636..13680, 13681..13725, 13726..13770, 13771..13815, 13816..13860, 13861..13905, 13906..13950, 13951..13995, 13996..14040, 14041..14085, 14086..14130, 14131..14175, 14176..14220, 14221..14265, 14266..14310, 14311..14355, 14356..14400, 14401..14445, 14446..14490, 14491..14535, 14536..14580, 14581..14625, 14626..14670, 14671..14715, 14716..14760, 14761..14805, 14806..14850, 14851..14895, 14896..14940, 14941..14985, 14986..15030, 15031..15075, 15076..15120, 15121..15165, 15166..15210, 15211..15255, 15256..15300, 15301..15345, 15346..15390, 15391..15435, 15436..15480, 15481..15525, 15526..15570, 15571..15615, 15616..15660, 15661..15705, 15706..15750, 15751..15795, 15796..15840, 15841..15885, 15886..15930, 15931..15975, 15976..16020, 16021..16065, 16066..16110, 16111..16155, 16156..16200, 16201..16245, 16246..16290, 16291..16335, 16336..16380, 16381..16425, 16426..16470, 16471..16515, 16516..16560, 16561..16605, 16606..16650, 16651..16695, 16696..16740, 16741..16785, 16786..16830, 16831..16875, 16876..16920, 16921..16965, 16966..17010, 17011..17055, 17056..17100, 17101..17145, 17146..17190, 17191..17235, 17236..17280, 17281..17325, 17326..17370, 17371..17415, 17416..17460, 17461..17505, 17506..17550, 17551..17595, 17596..17640, 17641..17685, 17686..17730, 17731..17775, 17776..17820, 17821..17865, 17866..17910, 17911..17955, 17956..18000, 18001..18045, 18046..18090, 18091..18135, 18136..18180, 18181..18225, 18226..18270, 18271..18315, 18316..18360, 18361..18405, 18406..18450, 18451..18495, 18496..18540, 18541..18585, 18586..18630, 18631..18675, 18676..18720, 18721..18765, 18766..18810, 18811..18855, 18856..18900, 18901..18945, 18946..18990, 18991..19035, 19036..19080, 19081..19125, 19126..19170, 19171..19215, 19216..19260, 19261..19305, 19306..19350, 19351..19395, 19396..19440, 19441..19485, 19486..19530, 19531..19575, 19576..19620, 19621..19665, 19666..19710, 19711..19755, 19756..19800, 19801..19845, 19846..19890, 19891..19935, 19936..19980, 19981..20025, 20026..20070, 20071..20115, 20116..20160, 20161..20205, 20206..20250, 20251..20295, 20296..20340, 20341..20385, 20386..20430, 20431..20475, 20476..20520, 20521..20565, 20566..20610, 20611..20655, 20656..20700, 20701..20745, 20746..20790, 20791..20835, 20836..20880, 20881..20925, 20926..20970, 20971..21015, 21016..21060, 21061..21105, 21106..21150, 21151..21195, 21196..21240, 21241..21285, 21286..21330, 21331..21375, 21376..21420, 21421..21465, 21466..21510, 21511..21555, 21556..21600, 21601..21645, 21646..21690, 21691..21735, 21736..21780, 21781..21825, 21826..21870, 21871..21915, 21916..21960, 21961..22005, 22006..22050, 22051..22095, 22096..22140, 22141..22185, 22186..22230, 22231..22275, 22276..22320, 22321..22365, 22366..22410, 22411..22455, 22456..22500, 22501..22545, 22546..22590, 22591..22635, 22636..22680, 22681..22725, 22726..22770, 22771..22815, 22816..22860, 22861..22905, 22906..22950, 22951..22995, 22996..23040, 23041..23085, 23086..23130, 23131..23175, 23176..23220, 23221..23265, 23266..23310, 23311..23355, 23356..23400, 23401..23445, 23446..23490, 23491..23535, 23536..23580, 23581..23625, 23626..23670, 23671..23715, 23716..23760, 23761..23805, 23806..23850, 23851..23895, 23896..23940, 23941..23985, 23986..24030, 24031..24075, 24076..24120, 24121..24165, 24166..24210, 24211..24255, 24256..24300, 24301..24345, 24346..24390, 24391..24435, 24436..24480, 24481..24525, 24526..24570, 24571..24615, 24616..24660, 24661..24705, 24706..24750, 24751..24795, 24796..24840, 24841..24885, 24886..24930, 24931..24975, 24976..25020, 25021..25065, 25066..25110, 25111..25155, 25156..25200, 25201..25245, 25246..25290, 25291..25335, 25336..25380, 25381..25425, 25426..25470, 25471..25515, 25516..25560, 25561..25605, 25606..25650, 25651..25695, 25696..25740, 25741..25785, 25786..25830, 25831..25875, 25876..25920, 25921..25965, 25966..26010, 26011..26055, 26056..26100, 26101..26145, 26146..26190, 26191..26235, 26236..26280, 26281..26325, 26326..26370, 26371..26415, 26416..26460, 26461..26505, 26506..26550, 26551..26595, 26596..26640, 26641..26685, 26686..26730, 26731..26775, 26776..26820, 26821..26865, 26866..26910, 26911..26955, 26956..27000, 27001..27045, 27046..27090, 27091..27135, 27136..27180, 27181..27225, 27226..27270, 27271..27315, 27316..27360, 27361..27405, 27406..27450, 27451..27495, 27496..27540, 27541..27585, 27586..27630, 27631..27675, 27676..27720, 27721..27765, 27766..27810, 27811..27855, 27856..27900, 27901..27945, 27946..27990, 27991..28035, 28036..28080, 28081..28125, 28126..28170, 28171..28215, 28216..28260, 28261..28305, 28306..28350, 28351..28395, 28396..28440, 28441..28485, 28486..28530, 28531..28575, 28576..28620, 28621..28665, 28666..28710, 28711..28755, 28756..28800, 28801..28845, 28846..28890, 28891..28935, 28936..28980, 28981..29025, 29026..29070, 29071..29115, 29116..29160, 29161..29205, 29206..29250, 29251..29295, 29296..29340, 29341..29385, 29386..29430, 29431..29475, 29476..29520, 29521..29565, 29566..29610, 29611..29655, 29656..29700, 29701..29745, 29746..29790, 29791..29835, 29836..29880, 29881..29925, 29926..29970, 29971..30015, 30016..30060, 30061..30105, 30106..30150, 30151..30195, 30196..30240