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OpenStudy (anonymous):
x^3 – 2^3 = (x – 2)(x^2 + 2x + 2^2) can someone explain this?
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hero (hero):
\[(x - 2)(x^2 + 2x + 4) \\= x^2(x - 2) + 2x(x - 2) + 4(x - 2) \\= x^3 - 2x^2 + 2x^2 - 4x + 4x - 8 \\ = x^3 - 8\]
hero (hero):
@dabeezy
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