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24 August, 07:02

What is the solution set of x^2-63=-2x

a.) (7,9)

b.) (-7,9)

c.) (-9,7)

d.) (0,21)

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Answers (1)
  1. 24 August, 08:33
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    x^2-63=-2x

    x^2 + 2x - 63 = 0

    (x+9) (x-7) = 0

    x+9 = 0

    x = - 9

    x-7=0

    x=7

    answer is c.) (-9,7)
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