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PLEASE HELP ME MATH

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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

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