Questions on Algebra: Quadratic Equation answered by real tutors!

Tutors Answer Your Questions about Quadratic Equations (FREE)

Question 104075: Solve by using the quadratic formula. x^2 = –5x – 5
Click here to see answer by jim_thompson5910(28536)

Question 104104: Solve (x + 5)^2 = 3
Click here to see answer by jim_thompson5910(28536)

Question 104102: Solve 5(x – 2)^2 = 3
Click here to see answer by jim_thompson5910(28536)

Question 104101: Solve by using the quadratic formula x^2 = –5x – 5
Click here to see answer by jim_thompson5910(28536)

Question 104055: Solve by using the quadratic formula. x^2 = –5x – 5
Click here to see answer by edjones(7569)

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

Question 104052: Solve for (x + 5)^2 = 3
Click here to see answer by ankor@dixie-net.com(15645)

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(57282)

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(57282)

Question 104373: How do you solve y=(x-3)squared.
Click here to see answer by jim_thompson5910(28536)

Question 104365: Solve by using the quadratic formula 5x^2 + x = 3
Click here to see answer by jim_thompson5910(28536)

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)

Question 104542: Solve by completing the square.
x^2 – 16x + 63 = 0
Click here to see answer by edjones(7569)

Question 104542: Solve by completing the square.
x^2 – 16x + 63 = 0
Click here to see answer by Fombitz(13828)

Question 104539: Find the x-intercepts.
y = x^2 + 3x + 1
Click here to see answer by edjones(7569)

Question 104537: Find the axis of symmetry.
y = x^2 + x – 3
Click here to see answer by stanbon(57282)

Question 104634: solve the following equation for x
(x+4)^2=81
Click here to see answer by jim_thompson5910(28536)

Question 104637: solve the following equation for x
7x^2-15X+5=3
Click here to see answer by jim_thompson5910(28536)

Question 104482: Good morning tutors,
I have a couple of questions. I have to solve and graph these equations and I was wondering if you could help me with these problems?
y = x^2 - 4x
and
y = 2x^2
Thank you very much.
Click here to see answer by ankor@dixie-net.com(15645)

Question 104698: x^2+8X+16=1
Click here to see answer by jim_thompson5910(28536)

Question 104815: please help me solve for x the equation 22=(9+x)x
Click here to see answer by duggie(26)

Question 104861: I'm trying to figure out the roots and the vertex to:2x^+4x-2
Click here to see answer by HyperBrain(694)

Question 104934: a toy rocket is launched from the top of a building 50 ft. tall at an initial velocity of 90 ft per second. Let t represent the amount of time elapsed after the launch. Solve.

the answer is y= -16x2 + 90x + 50
How did the get the -16x squared??
Click here to see answer by Earlsdon(6287)

Question 104971: Simplify. 3/4 divided by 4/5

Click here to see answer by Fombitz(13828)

Question 104968: Solve. x^2 + 6x – 27 = 0
Click here to see answer by jim_thompson5910(28536)

Question 105072: Tutor,
I am think this is incorrect could you please help me with this problem:
Solve by using the quadratic formula
4x^2 - 3x + = 0 (no real number solutions?)
and
X^2 + x - 2 = 0 (is this 1,2 ?)
Any help is appreciated.
Click here to see answer by jim_thompson5910(28536)

Question 105083: Tutor,
I am having problems getting the correct sign. I would appreciate your help with these two problems.
Solve:
x^2 + 8x - 20 = 0 (10 and 2 are the numbers which are negative and possitive)
and
x^2 + 16x + 60 = 0 (6 and 10 are the numbers I have the same problem)
I have the most difficulty with the signs I am not sure I am getting the right negatives and possitives. Thank you for your guidance on my problems.
Click here to see answer by Earlsdon(6287)

Question 105112: Good Morning Tutor,
Could you tell me if I have these problems correct?
Solve:
x^2 + 7x - 1 = 0 is (-6 +- sqrt of 50 / 2)
Solve by completeing the square:
2x^2 + 8x - 5 = 0 is (4 +- sqrt of 26 / 2)
Thank you for your help this morning.
Click here to see answer by MathLover1(6625)

Question 105122: Need help solving: 3x^2-2x+1=0 using the quadratic formula. I'm getting weird answer and it is confusing me.
Click here to see answer by MathLover1(6625)

Question 105139: Please help me solve.
Multiply. n^2-n-20/2n^2 x n^2+5n/n^2-25
Click here to see answer by Fombitz(13828)

Question 105141: Please help me solve.
sq rt (3x+6) -3=0
Click here to see answer by Fombitz(13828)

Question 105128: Z + 1/Z = 1
Z ^64 + 1/ Z^64 = ?
Click here to see answer by Fombitz(13828)

Question 105194: Hello Tutor,
I am in need of some help if you can help me out I would appreciate it.
Solve by completing the square:
1.) 4x^2 + x - 3 = 0 I got -3/4 , 1 is this correct?
2.) x^2 = 5x + 2 I think this is 5 +- sqrt of 33 / 2 is this correct?
3.) 4x^2 + 2x - 3 = 0 I got -1+- sqrt of 13 / 8 is this correct?
I am not sure I am solving these questions of completing the squares correctly if you could tell me if I have them correct I would appreciate it. Thanks in advance.
Click here to see answer by edjones(7569)

Question 105207: Could you help me with this problem?
The demand and supply equations for a certain item are given by
D= -15p + 30
S= -p^2 + 20p - 18
Find the equilibrim price.
I have gotten serveral different answers however is the answer $1.43?
Click here to see answer by edjones(7569)

Question 105138: the demand and supply equations for a certain item are given by
D= -5p+40
s= -p+30p-8
Find the equilibrium price.
Click here to see answer by elima(1433)

Question 105195: Tutor if you could help me with this I would appreciate it. I need to find the table of values for y= -x^2 - 2x and for y = x^2 - 1. Thank you for your help.
Click here to see answer by checkley75(3666)

Question 105218: 1/x-4 +x/x-5 +1/x^2-9x+20=0 I have to solve for x I have the LCD to be(x-4)(x-5) I multiplied the numerator times the LCD and got (x-5)+x(x-4)+1=0. Next I got x-5+x^2-4x+1=0. I combined my like terms and got -3x-4+x^=0. The x ^2 keeps throwing me off because I don't know what to do with it. Please show me what to do.
Click here to see answer by jim_thompson5910(28536)

Question 105088: Good Evening tutor,
Could you tell me if I have these correct?
Solve by completing the square:
1.) 4x^2 + 2x - 3 = 0 is (-1+-sqrt of 13 / 8)
2.) x^2 = 5x + 2 is (5 +- sqrt of 29 / 2)
3.) 4x^2 + x - 3 = 0 is (1, -3/4)
I want to make sure I solved these correctly so any assistance is very much appreciated. Thank you in advance.

Click here to see answer by checkley75(3666)

Question 105255: how do i write this function in standard quadratic equation form?
1.) y = -(3x-4)^2 + 6
Click here to see answer by Earlsdon(6287)

Question 105257: what can a and k be so both points are on the graph of function?
points are (1,11) and (2,-19); function is y= a(x+1)^2 + k
how can i find the function so that both poitns are on the graph??
Click here to see answer by Earlsdon(6287)

Question 105256: what can a and k be so both points are on the graph of function?
points are (0,1) and (2,1); function is y= a(x-1)^2 + k.
how can i find the function so that both poitns are on the graph??
Click here to see answer by edjones(7569)

Question 105254: find quadratic function ax^2 + c with a graph that has the given points:
1.) (2, 5/2) and (0,-1/2)
using those points, how can i come up with the function??
Click here to see answer by edjones(7569)

Question 105344: 3x^2 - 4x - 7 = 0
and
x2 + 5x - 6 = 0
Very confused.
Click here to see answer by checkley75(3666)

Question 105344: 3x^2 - 4x - 7 = 0
and
x2 + 5x - 6 = 0
Very confused.
Click here to see answer by scott8148(6628)

Question 105453: The product of two numbers is 5 and the sum of their reciprocals is 9/10. Find the numbers.
Click here to see answer by checkley75(3666)

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