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OpenStudy (anonymous):
27x^3 - 512y^3
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OpenStudy (anonymous):
Help please. :(
OpenStudy (aum):
\[\large 27x^3 - 512y^3 = (3x)^3 - (8y)^3 \]Make use of the identity:\[\large a^3 - b^3 = (a-b)(a^2+ab+b^2) \]Here\[\large a = 3x; ~~~ b = 8y\]
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