Questions on Algebra: Quadratic Equation answered by real tutors!

Tutors Answer Your Questions about Quadratic Equations (FREE)

Question 455955: using the graph determine the roots of the equation x^2-2x-3=0

Click here to see answer by rfer(16322)

Question 456184: Hi everyone, I have two problems to solve:
x^2+3x-4=0
x^2+2x-8=0
Thank you,
Gina
Click here to see answer by nerdybill(7384)

Question 456276: x^2+7x-44=0 I need to use the quadratic formula to solve the equation.
Click here to see answer by Alan3354(69443)

Question 456298: 4n^2=-6n-1 use quadratic formula.

Click here to see answer by rfer(16322)

Question 456027: please help with this math problem: write the quadratic equation that has these complex solutions:(3+-isqrt(13))/2
Click here to see answer by ankor@dixie-net.com(22740)

Question 456391: what is the answer to this problem: 4x^2 � 2x � 5 = 0
Click here to see answer by richwmiller(17219)

Question 456465: How so you solve?
2(x-1)^2=17

And
-X^2+13=3
Click here to see answer by Alan3354(69443)

Question 456485: The perimeter of a rectangle is 46 yd , and the area of the rectangle is 90 yd squared 2 . Find the dimensions of the rectangle.

Click here to see answer by tquon(6)

Question 456494: whats x2+16x=-48
Click here to see answer by Alan3354(69443)

Question 456494: whats x2+16x=-48
Click here to see answer by tquon(6)

Question 456531: The dimensions of a rectangular flower garden were 8 m by 15 m . Each dimension was increased by the same amount. The garden then had an area of 198 m2. Find the dimensions of the new garden.
Click here to see answer by tquon(6)

Question 456575: I have been working on a problem and I cannot figure out how to get an approximated answer to three decimals. Can you show me how to get this.
This is what I have so far.
In the right trianle, find the length of the side not given. Give an exact answer and an approximation to 3 decimal places.
a = 13 b = 13 a+b=c 13^2+13^2=c^2 169+169=c^2
169+169=338 338=c^2
This is what I have so far. Take the square root of both sides c=338. The exact value of c is the sqrt of 338. The value approximated to three decimals is ?
Am I doing this problem correctly? If I am I do not know how to get the value appoximated to three decimals. Can you help me please?
Click here to see answer by edjones(8007)

Question 456546: solve 2(w+4)+2w

Click here to see answer by edjones(8007)

Question 456617: Good morning,
I need to solve using the quadratic formula,
3x^2-4x-15=0
Thanks
Gina
Click here to see answer by mananth(16946)

Question 456597: What is the Basic tricks to answer a Quadratic Formula?
Click here to see answer by rfer(16322)

Question 456597: What is the Basic tricks to answer a Quadratic Formula?
Click here to see answer by Alan3354(69443)

Question 456616: Please please help
Find the quadraic equation that fits the following set of data points
(5,9),(4,-45),(-1,-15)
Click here to see answer by ankor@dixie-net.com(22740)

Question 456739: Solve the equation by completing the square.
a. Write irrational numbers in simplest radical form.
b. Describe each step as you go.
X^2 + 4x � 8 = 0
Click here to see answer by stanbon(75887)

Question 456742: 225c^2+810cp+729p^2 factor
Click here to see answer by solver91311(24713)

Question 456793: List the possible rational zeros of: 3x^4+2x^3-x+15.
I know the answer from the back of the book but if
you could show the work so i could see how you did
it that would be nice. Thank you.
Click here to see answer by stanbon(75887)

Question 456779: The common algorithm for calculating the roots of a quadratic equation by the quadratic formula requires considering several special cases in your code, including consideration of special cases when one or more coefficients vanish. Write appropriate comments for this algorithm so that the comments make it easy to see the different cases and how they are handled. Write accompanying documentation to explain the algorithm. Total target answer should be no more than 2 pages
I need help on this ASAP
Tks
Click here to see answer by solver91311(24713)

Question 456799: find the x- and y-intercepts
f(x)=25x^2+10x+1
Click here to see answer by lwsshak3(11628)

Question 456819: Find the x-intercept(s) and the coordinates of the vertex for the parabola y=x^2+2x-24
. If there is more than one x-intercept, separate them with commas.
Click here to see answer by spacesurfer(12)

Question 456834: 2x^2-4x-4=y
solve for y
Click here to see answer by spacesurfer(12)

Question 456825: what equation of axis of symmetry of a parabola if its x-intercepts are 5 and -5
Click here to see answer by spacesurfer(12)

Question 456977: If one root of the equation X^2+K(3K-5x)=1-2K is four time than other,find the value of k
Thanks~~
Click here to see answer by robertb(5830)

Question 456974: Find a quadratic equation with
x=22 and x=-11

Click here to see answer by mananth(16946)

Question 457191: How do you change a problem such as, 2x^2=-6+8x, into a quadratic equation that can be solved using the quadratic formula?
Click here to see answer by nerdybill(7384)

Question 457191: How do you change a problem such as, 2x^2=-6+8x, into a quadratic equation that can be solved using the quadratic formula?
Click here to see answer by stanbon(75887)

Question 457223: What are the roots of the Quadratic equation that is graphed in the accompanying diagram?
1) (2,2)
2) (-2,2)
3) (-2,-2)
4) (2,0)

There is a parabola with the coordinates of (-2,0), (2,0), (-1,-3), (1,-3), and (0,-4) is on the diagram shown.
Click here to see answer by Alan3354(69443)

Question 457233: How do you change a problem such as, x^2-51=-2x, into a quadratic equation using the quadratic formula?
Click here to see answer by richwmiller(17219)

Question 457262: Given that p+1 and q+1 are the roots of the equation x^2-x-12=0,find the possible of p and Q,thanks~~
Click here to see answer by josmiceli(19441)

Question 457251: Give the exact and approximate solutions to three decimal places.
x^2-5x+3=0
exact solutions are x=
approximate solutions to 3 decimal places are x=
Click here to see answer by richwmiller(17219)

Question 457229: Please help with this homework!

Suppose you are an event coordinator for a large performance theater. One of the hottest new Broadway musicals has started to tour and your city is the first stop on the tour. You need to supply information about projected ticket sales to the box office manager. The box office manager uses this information to anticipate staffing needs until the tickets sell out.
You provide the manager with a quadratic equation that models the expected number of ticket sales for each day x.
(x = 1 is the day tickets go on sale).
Tickets = -0.6x2 + 12x + 11
Does the graph of this equation open up or down?
How did you determine this?

Describe what happens to the ticket sales as time passes.

Use the quadratic formula to determine the last day that tickets will be sold.
Hint: Write your answer in terms of the number of days after ticket sales begin and you can�t have partial days.
Will tickets peak or be at a low during the middle of the sale?
How do you know?
After how many days will the peak or low occur?
Hint: Use the axis of symmetry formula.
How many tickets will be sold on the day when the peak or low occurs?
Hint: Substitute your value from question 7 into the original quadratic equation.
What are the coordinates of the vertex?
How did you determine this?
How many solutions are there to the original quadratic equation given in question 3?
How do you know?

Click here to see answer by richwmiller(17219)

Question 457249: Find the vertex, line of symmentry, maximum or minimum value of the quadratic function and graph the function. f(x)=-(x+3)^2-2
Click here to see answer by poliphob3.14(115)

Question 457407: 2. Solve the equation by using the quadratic formula. Use √( ) and � , if you want.
a. Write irrational numbers in simplest radical form.
b. Explain each step as you go.
X^2 + 4x � 8 = 0
Click here to see answer by MathLover1(20849)

Question 457466: Find and label the vertex and the line of symmetry. Graph the function. f(x) = 2x^2
Click here to see answer by rfer(16322)

Question 457469: Find and label the vertex and the line of symmetry. Graph the function. f(x) = (x+1)^2
Click here to see answer by stanbon(75887)

Question 457469: Find and label the vertex and the line of symmetry. Graph the function. f(x) = (x+1)^2
Click here to see answer by rfer(16322)

Question 457467: Find and label the vertex and the line of symmetry. Graph the function. f(x) = (x+3)^2
Click here to see answer by rfer(16322)

Question 457485: I have to solve the equation x^2+ 12x-64=0 using the 6 step Indian process and I am not coming up with good numbers
Click here to see answer by mananth(16946)

Question 457485: I have to solve the equation x^2+ 12x-64=0 using the 6 step Indian process and I am not coming up with good numbers
Click here to see answer by Edwin McCravy(20055)

Question 457459: x(x-24)=0
Click here to see answer by jim_thompson5910(35256)

Question 457641: Please help me solve the problem :
The product of two numbers is 90.
One number is 3 more than twice the other number.
Model these numbers with a quadratic equation.
Solve the equation by factoring and using the Zero-Product Property.
Click here to see answer by oberobic(2304)

Question 457703: A telephone company in a town has 1000 subscribers on its list and collects a fixed charge of Rs.400 per subscriber per year. The company proposes to increase the annual subscription and it is believed that for every increase of Re. 1, one subscriber will continue the service. Find what increase will bring maximum revenue to the company.
Click here to see answer by stanbon(75887)

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