Questions on Algebra: Quadratic Equation answered by real tutors!

Tutors Answer Your Questions about Quadratic Equations (FREE)

Question 430675: Determine the number of real-number solutions to the equation from the given graph.

9^2+6x+1= 0, given the graph of y = 9^2+6x+1

Click here to see answer by Alan3354(69443)

Question 430719: Determine the two x-intercepts and the vertex in (x,y) form and explain how you
found these ordered pairs in a sentence
Click here to see answer by Alan3354(69443)

Question 430769: A projectile is launched upward from the ground. Its height s in feet above the ground after t seconds is given by
s= 320t-16t^2
a) After how many seconds in the air will it hit the ground? Round to the nearest hundredth.
b) During what time interval is the projectile more than 576 feet above the ground? Round to the nearest hundredth.
Click here to see answer by Alan3354(69443)

Question 430773: (x+1)^2/3+ (x+1)^1/3-2=0
Click here to see answer by vleith(2983)

Question 430903: 5. Graph the quadratic variation if g(x) varies directly with x2, and g(x) = 50 when x = 5.
(Points : 1)

Click here to see answer by htmentor(1343)

Question 430968: Solve by the quadratic formula simplify answer:
4x^2+x�1=0
6x^2-2x-1=0

Click here to see answer by jorel1380(3719)

Question 431049: write a quadratic equation that has the solutions of -2 and 5
Click here to see answer by htmentor(1343)

Question 431049: write a quadratic equation that has the solutions of -2 and 5
Click here to see answer by ewatrrr(24785)

Question 431049: write a quadratic equation that has the solutions of -2 and 5
Click here to see answer by richard1234(7193)

Question 431095: d=a*b+(1.6667a*c) solve for a; I asked this question awhile ago, no response. Is it unsolvable?
Click here to see answer by solver91311(24713)

Question 431083:
Click here to see answer by Gogonati(855)

Question 431169: What is x with x2-2x-13=0? And x2+12x-64=0? I've tried several times to find out what x is but neither of my solutions to these problems seem correct.
Click here to see answer by richard1234(7193)

Question 431243: How do you graph m� - 5m � 14 = 0 ?
Click here to see answer by stanbon(75887)

Question 431444: please help me with this equation y=4x^2-8x-16.
Click here to see answer by rfer(16322)

Question 431408: Find the vertex and x-intercept(s) of the function given below.
y=(x-4)(x+2)
A. Vertex: (-4,2); Intercepts: x = 3, -3
B. Vertex: (1,-9); Intercepts: x = 4, -2
C. Vertex: (1,9); Intercepts: x = -4, -2
D. Vertex: (1,-5); Intercepts: x = -4, 2

Click here to see answer by rfer(16322)

Question 431520: find the roots of each equation using the quadratic formula.
6x^2+12x=-5
Click here to see answer by Edwin McCravy(20054)

Question 431617: find the roots of quadratic equations by factoring, x^2-6x+8
Click here to see answer by jorel1380(3719)

Question 431681: x^2-10x+25 name how many roots and what kind
Click here to see answer by rfer(16322)

Question 431681: x^2-10x+25 name how many roots and what kind
Click here to see answer by Alan3354(69443)

Question 431714: Xsquared+10x=18
I tried putting the 18 on the other side, to make it equal 0, but then there are no numbers that are multiples of -18 that add to 10?
I need the 2 possible solutions (numbers) to this problem.
Click here to see answer by jorel1380(3719)

Question 431797: Factor the expression by taking out the greatest common factor.
13x^2y^3-52x^5y^3-91x^4y^4
Pls show me the steps to get the answer. Thanks
Click here to see answer by shree840(260)

Question 431822: 4n to the power of 2 - 10n + 12 = 6
Click here to see answer by algebrahouse.com(1659)

Question 431788: Factor the expression by taking out the greatest common factor.
11a^2-55a^3
Pls show me the steps to get the answer. Thanks
Click here to see answer by richard1234(7193)

Question 431925: I have the equation
I know the turning point is h,k
According to this it is -1,3 when in fact it is 20,3
How is this justified
Thanks
Click here to see answer by Alan3354(69443)

Question 431955: g^2+5g=24
Click here to see answer by anshu_a(16)

Question 431954: t^2-6t-27
Click here to see answer by algebrahouse.com(1659)

Question 431957: I am having a very hard time with these quadratic equations. Can someone help me understand this one and how to solve?
(1) 4x2 + 14x = 0
Thanks.
Click here to see answer by anshu_a(16)

Question 431952: 60r^2+80r+25
Click here to see answer by anshu_a(16)

Question 431796: Factor the expression by taking out the greatest common factor.
90a^3b^2-30a^2b^3+40a^3b^3
Pls show me the steps to get the answer. Thanks
Click here to see answer by jsmallt9(3758)

Question 432020: Create a quadratic equation for these:
x = 4, x = -3
Click here to see answer by Gogonati(855)

Question 431975: I am a resource teacher for freshman. One of my students has the problem (3/x-1) - 4= (1/x+1). He must use the quadratic formula to solve. Help!
Click here to see answer by ewatrrr(24785)

Question 432186: The difference of two numbers is 4 and the sum of their reciprocals is 3/8. Find the numbers.
Click here to see answer by shree840(260)

Question 432185: The sum of two numbers is 15 and the difference of their reciprocals is 1/10. Find the numbers.
Click here to see answer by shree840(260)

Question 432152: Please help me with this word problem!
A rectangle has a perimeter of 6 centimeters and an area of 2 square centimeters. Find its dimensions.

The answer is 2 centimeters by 1 centimeter but I don't know how to get that.
Click here to see answer by sudhanshu_kmr(1152)

Question 432246: please help with this.
For the equation 3x^2-4x-5=0
find a,b,and c.
a=
b=
c=
Then solve the equation using the quadratic formula
Click here to see answer by Alan3354(69443)

Question 432312: h=-16t^2+64t
A. The object reaches its maximum height 2 seconds after it is propelled. What is the maximum height?
B. After how many seconds does the object hit the ground?

Please help me work this out!!
Thanks,
Chris
Click here to see answer by stanbon(75887)

Question 432383: ~Equations that are Quadratic in Form~
How do I solve this problem: 2x^2/3+5^1/3-12=0.
I know I'm supposed to substitute something for T, but i don't know what I'm supposed to substitute. I know how to do the rest of the problem just not how to find what to substitute for t.

~thank you
Click here to see answer by belle3833(46)

Question 432421: y=-4x^2+12x-5
Click here to see answer by Gogonati(855)

Question 432549: I have been given a problem from a classmate that I find hard to figure. I need to write a quadratic equation that has the solution of:
x=5 or x=-5
I am beginning to understand how to work quadratics however I am not sure how to do this. Can someone help?
Click here to see answer by algebrahouse.com(1659)

Question 432550: Can anyone help me with this problem?
x^2+3x+2=0
Any help would be great.
Click here to see answer by ewatrrr(24785)

Question 432550: Can anyone help me with this problem?
x^2+3x+2=0
Any help would be great.
Click here to see answer by sudhanshu_kmr(1152)

Question 432764: Please help me solve and check this problem. Thank you!
2/3x=42

Click here to see answer by edjones(8007)

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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, 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