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OpenStudy (anonymous):
Factor the following polynomial: x2 – 4x – 21 A. (x – 1)(x + 21) B. (x – 3)(x + 7) C. (x – 21)(x + 1) D. (x – 7)(x + 3)
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OpenStudy (anonymous):
x^2 - 7x + 3x - 21 x(x-7) + 3 (x-7) (x+3)(x-7)
OpenStudy (anonymous):
WHATS THAT ? ^^ @nphuongsun93
OpenStudy (anonymous):
it's D.
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