Destiny8167 Destiny8167

03-01-2018
Mathematics

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Which of the binomials below is a factor of this trinomial? x2 - 7x - 18

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zrh2sfo zrh2sfo

03-01-2018

(x+2)(x-9)

x^2 - 7 x - 18
The factors of -18 that sum to -7 are 2 and -9. So, x^2 - 7 x - 18 = (x + 2) (x - 9):
Answer: (x + 2) (x - 9)

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