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19 July, 22:08

What are the solution of the equation x^2 - 4x - 32 = 0? show your work and justify each step.

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  1. 19 July, 22:26
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    X^2-4x-32=0

    (x+a) (x+b)

    x^2 - (a+b) x+ab

    a+b=4

    ab=-32

    a=-b+4

    (-b+4) b=-32

    -b^2+4b=-32

    b^2-4b-32=0

    b=8,-4

    If b=8, a=-4

    If b=-4, a = 8

    Plug in a and b to (x+a) (x+b)

    x = - 4, 8
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