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OpenStudy (anonymous):
how to factor 7y^3-448?
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OpenStudy (anonymous):
The only thing you can factor here is the 7 (if I'm reading your equation correctly: \[7((y ^{3})-64)\]
OpenStudy (shamim):
7y^3-448 =7(y^3-64) =7(y^3-4^3) =7(y-4)(y^2+4y+4^2) =7(y-4)(y^2+4y+16)
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