Questions on Algebra: Quadratic Equation answered by real tutors!

Tutors Answer Your Questions about Quadratic Equations (FREE)

Question 87868: Solve the quadratic equation by completing the square
x^2-6x-3=0
Thanks in advance.
Click here to see answer by rapaljer(4671)

Question 87869: Solve the quadratic equation by completing the square.
2x^2+10x+11=0
Thanks in advance.
Click here to see answer by Nate(3500)

Question 87932: use the quadratic function (((f(x)=-2/5(x+2)^2-3))) to answer the following:
A)Find the vertex
B)What is the axis of symmetry?
C)How does the graph open(up or down)?
Thanks you for any help you can provide. what i have so far is the formula which i believe is correct: (-b/2a,f(-b/2a)). I also have a=-2/5 b=(x+2)^2 but I'm not positive just because its a fraction, I'm unsure. well thanks for your help!
Click here to see answer by Nate(3500)

Question 87941: solve equation, by making appropriate substitution.
a)x^-2+x^-1-56=0
U=
U^2=
b)x^2/3-x^1/3-12=0
U=
U^2=

Click here to see answer by Edwin McCravy(20054)

Question 87940: solve equation, by making appropriate substitution.
a)x^-2+x^-1-56=0
U=
U^2=
b)x^2/3-x^1/3-12=0
x=
x^2=

Click here to see answer by madhujiithcharu@yahoo.co.in(28)

Question 87938: solve each equation below by making the appropriate substitution. Be sure to check answer(s): PLEASE HELP ME!
A)X^-2+X^-1-56=0
U=
u^2=
Answer:
B)x^2/3-x^1/3-12=0
U=
U^2=
Answer:
Click here to see answer by stanbon(75887)

Question 87942: hello,
thanks for all of your help. if you've received/ or seen my last 2 questions can you plese respond or a least let me know when you'll be able to answer them. perferably ASAP. Thanks again.
Click here to see answer by rapaljer(4671)

Question 88034: Solve
3x^2-2x+1=0
Having trouble..any help appreciated.
Click here to see answer by jim_thompson5910(35256)

Question 88032: Solve
2x^2-5x=3
Having trouble..any help appreciated.
Click here to see answer by jim_thompson5910(35256)

Question 88145: d� + 3d - 7 = 0
Click here to see answer by Edwin McCravy(20054)

Question 88166: Can someone show me how to do this problem with step by step instructions. Thank you
The height h in feet of an object after t seconds is given by the function h=16t^2+90t+8.
How long will it take the object to hit the ground? Round your answer to the nearest thousandth.
Click here to see answer by rapaljer(4671)

Question 88052: determine the quadratic equation for the parabola.maxium value:6 ; x-intercept : -2 and 4
Click here to see answer by ankor@dixie-net.com(22740)

Question 88165: Would someone show me step by step how to figure out this word problem? Thank you
The length of a rectangle is 1cm more than 5 times its width. If the area of the rectangle is 79 cm^2, find the dimensions of the rectangle to the nearest thousandth.
Click here to see answer by ankor@dixie-net.com(22740)

Question 88249: Graph the following equation: y = �x^2 + 2x
Click here to see answer by jim_thompson5910(35256)

Question 88246: Graph the following equation: y = �x^2 + 1
Click here to see answer by jim_thompson5910(35256)

Question 88244: Graph the following equation: y = �x^2 + x
Click here to see answer by jim_thompson5910(35256)

Question 88255: Find the constant term that should be added to make the following expression a perfect-square trinomial.
x^2+7x
Click here to see answer by stanbon(75887)

Question 88257: Solve by using the quadratic formula. 2x^2 + 5x = 4

Click here to see answer by jim_thompson5910(35256)

Question 88260: Solve. x^2 � 7x � 4 = 0

Click here to see answer by jim_thompson5910(35256)

Question 88256: Is the following trinomial a perfect square?
x^2 + 8x � 16
yes or no
Click here to see answer by stanbon(75887)

Question 88259: Solve by using the quadratic formula. x^2 = 5x + 8

Click here to see answer by jim_thompson5910(35256)

Question 88254: Solve. x^2 + 1 = 17
Click here to see answer by jim_thompson5910(35256)

Question 88263: Solve by using the quadratic formula. 3x^2 = 11x + 4
Click here to see answer by jim_thompson5910(35256)

Question 88264: Solve. x^2 + 8x + 15 = 0

Click here to see answer by jim_thompson5910(35256)

Question 88266: Solve. (x � 5)^2 = 7

Click here to see answer by stanbon(75887)

Question 88269: Find the axis of symmetry.
y = �x^2 + 4x � 6

Click here to see answer by jim_thompson5910(35256)

Question 88267: Find the constant term that should be added to make the following expression a perfect-square trinomial.
x^2-2x

Click here to see answer by jim_thompson5910(35256)

Question 88267: Find the constant term that should be added to make the following expression a perfect-square trinomial.
x^2-2x

Click here to see answer by stanbon(75887)

Question 88271: Find the x-intercepts.
y = x^2 + 4x

Click here to see answer by jim_thompson5910(35256)

Question 88265: Is the following trinomial a perfect square? Explain why or why not.
x^2 � 18x + 81

Click here to see answer by rapaljer(4671)

Question 88277: Solve by completing the square.
x^2 � 10x + 24 = 0

Click here to see answer by Nate(3500)

Question 88276: Solve by completing the square.
x^2 = 5x + 2

Click here to see answer by Nate(3500)

Question 88258: Solve by completing the square.
x^2-10x+24=0
Click here to see answer by tutor_paul(519)

Question 88291: I'm suppose to complete the square, I don't understand how you're supposed to do that.
Here's the problem:
x^2+12x+
Thanks for your help!
Click here to see answer by stanbon(75887)

Question 88278: A rectangular garden is to be surrounded by a walkway of constant width. The garden�s dimensions are 30 ft by 40 ft. The total area, garden plus walkway, is to be 1800 ft2. What must be the width of the walkway to the nearest thousandth?
Click here to see answer by ankor@dixie-net.com(22740)

Question 88292: I'm supposed to use the quadratic formula to solve, but leave irrational roots in the simplest radical form.
3x^2-4x-5=0
Thaks alot
Click here to see answer by tutor_paul(519)

Question 88319: Solve by completing the square.
x^2 = 5x + 2

Click here to see answer by avilleredbone08(2)

Question 88326: Solve by completing the square.
x^2 = 5x + 2

Click here to see answer by stanbon(75887)

Question 88322: The demand and supply equations for a certain item are given by
D = �5p + 40
S = �p2 + 30p � 8
Find the equilibrium price.

Click here to see answer by jim_thompson5910(35256)

Question 88322: The demand and supply equations for a certain item are given by
D = �5p + 40
S = �p2 + 30p � 8
Find the equilibrium price.

Click here to see answer by stanbon(75887)

Question 88331: Identify the axis of symmetry, create a suitable table of values, then sketch the graph (including the axis of symmetry).
y = �x^2 + 3x � 3

Click here to see answer by jim_thompson5910(35256)

Question 88178: can you please help me to sinplify: ( 5+2a+3a2)- (a2+a-6)
x(4x2+3x-5)-2(4-x2)
Evalute: x(x+1)(x-1)
Click here to see answer by SandySharma(35)

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