PLEASE HELP ME MATH

posted by .

I only have 1 hour to get this question answered. Thank you in advance. I need a quadratic equation in the variable x given the solutions:
-7 sqrt 7, and 7 sqrt 7
This needs to be in the standard form of ax^2+bx+c=0.
Can someone please help me with this???? I am so lost!!!!

  • PLEASE HELP ME MATH -

    For a quadratic equation with given zeroes z1 and z2, the equation is:
    (x-z1)(x-z2)=0
    In the given case, z1=-7√7 and z2=7√7.
    Expand and simplify the resulting expression on the left-hand-side, and equate coefficients of powers x², x and constant term to get the values of a, b and c.

    I gave you response to a similar question, except that I forgot the variable x, which should have read:
    x² -5√5x -30 = 0

    see:

    http://www.jiskha.com/display.cgi?id=1289541351

  • PLEASE HELP ME MATH -

    I understand, although mathlab checked it wrong and gave me this problem. I SIMPOLY do not understand this when it comes to radicals. And furthermore mathlab has a habit of checking problems wrong when they are indeed right.I understand how to FOIL, I just do not know how to work the radicals, CAN YOU PLEASE HELP ME!!!! This is due in 1 hour. Thank you so much!!!

  • PLEASE HELP ME MATH -

    And you are paying for Mathlab?

  • PLEASE HELP ME MATH -

    Just follow MathMate instructions and set it as
    (x - 7√7)(x+7√7) = 0
    looks like the difference of squares pattern, so ...

    x^2 - 343 = 0

    then
    a=1
    b=0
    c=-343

    try that as input

Respond to this Question

First Name
School Subject
Your Answer

Similar Questions

  1. MATH

    I need to simply this equation, but I got stuck. h/(4-sqrt(16+h)) = y First, I multiplied (4+sqrt(16+h)/(4+sqrt(16+h) to both sides, and I ended up with h(4+sqrt(16+h)/-h. Is this correct?
  2. math calculus please help!

    l = lim as x approaches 0 of x/(the square root of (1+x) - the square root of (1-x) decide whether: l=-1 or l=0 or l=1 Let me make sure I understand the question. Do we have lim x->0 x/[sqrt(1+x) - sqrt(1-x)] ?
  3. math

    solve 2x^2+3x+8=0 and express the solutions in a+bi form. Let's use the quadratic formula to solve for x and express those solutions in a+bi form. x = [-b + or - sqrt(b^2 - 4ac)]/2a Note: sqrt = square root. a = 2, b = 3, and c = 8 …
  4. math,help,algebra I

    I need help can someone help me get unstuck and let me know if i am correct.thank you. solve by completing the square. 4x^2+2x-3=0 this is what i am doing: i used the quadratic equation. so where i am is in this step: x = (-2 (+-) …
  5. Math Help please!!

    Could someone show me how to solve these problems step by step.... I am confused on how to fully break this down to simpliest terms sqrt 3 * sqrt 15= sqrt 6 * sqrt 8 = sqrt 20 * sqrt 5 = since both terms are sqrt , you can combine …
  6. Calculus

    Please look at my work below: Solve the initial-value problem. y'' + 4y' + 6y = 0 , y(0) = 2 , y'(0) = 4 r^2+4r+6=0, r=(16 +/- Sqrt(4^2-4(1)(6)))/2(1) r=(16 +/- Sqrt(-8)) r=8 +/- Sqrt(2)*i, alpha=8, Beta=Sqrt(2) y(0)=2, e^(8*0)*(c1*cos(0)+c2*sin(0))=c2=2 …
  7. algebra

    write a quadratic equation having the given numbers as solutions 6 - sqrt(2) , 6 + sqrt(2) thanks for any help
  8. Algebra

    I have a question if someone could help, please explain it. Given b = -1 and h = -1, what is the equation of the graph if the parent function is y = sqrt (x) Answers: a.y = sqrt(x-1) b.y = sqrt (-x+1) c.y = - sqrt (-x-1) d.y = sqrt(-x-1) …
  9. Algebra-drwls please check!

    Posted by Megan on Tuesday, October 12, 2010 at 3:44pm. I have a question if someone could help, please explain it. Given b = -1 and h = -1, what is the equation of the graph if the parent function is y = sqrt (x) Answers: a.y = sqrt(x-1) …
  10. Math!!!!

    I am getting desperate. Can someone please help me with this and thank you in ADVANCE!!!! WRITE A QUADRATIC EQUATION IN THE variable x given the solutions: -sqrt7, 7sqrt7.This needs to be in the standard form ax^2 + bx+c=0. I really …

More Similar Questions