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OpenStudy (anonymous):
x squared -7x-18=
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jimthompson5910 (jim_thompson5910):
x^2-7x-18 x^2-9x+2x-18 (x^2-9x)+(2x-18) x(x-9)+2(x-9) (x+2)(x-9) So x^2-7x-18 factors to (x+2)(x-9) In other words, x^2-7x-18=(x+2)(x-9)
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