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OpenStudy (anonymous):
x2 − 4x − 21
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OpenStudy (anonymous):
|dw:1375391524320:dw|
OpenStudy (anonymous):
he's right ^
OpenStudy (uri):
x^2-4x-21 x^2-7x+3x-21 x(x-7)+3(x-7) (x-7)(x-3)
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