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21 January, 16:43

Can someone check my answer:

What is the solution set to x^2 = 6x + 27?

A. (-9, - 3)

B. (-3, 9)

C. (9, - 3)

D. (3, 9)

My answer: B. (-3, 9)

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Answers (1)
  1. 21 January, 17:11
    0
    Minus 6x+27 both sides

    x^2-6x-27=0

    factor

    what 2 numbers multiply to get - 27 and add to get - 6

    -9 and 3

    (x-9) (x+3) = 0

    set to zero

    x-9=0

    x=9

    x+3=0

    x=-3

    x=9 and - 3

    C or B is the answer, they are the same, just switched

    if there is some new way of doing it, I don't konw

    I would pick B
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