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OpenStudy (anonymous):
identify the factors of x2 − 4x − 21.
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OpenStudy (magbak):
(x+3)(x-7)
OpenStudy (nurali):
x2 − 4x − 21 x2 − 7x+3x − 21. (x-7)(x+3)
OpenStudy (anonymous):
x2 − 4x − 21 Here we have to break the middle term x2-7x+3x-21 x(x-7)+3(x-7) (x-7)(x+3)
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