erica37
erica37
31-10-2016
Mathematics
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How do you answer this?
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royalty1217
royalty1217
31-10-2016
(a + b)^3 = a^3 + 3a^2b + 3ab^2+ b^3
(a +(- b))^3 = (a-b)^2 = a^3 - 3a^2b + 3ab^2- b^3
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