(x + 2y)^3 - x - 2y
=(x + 2y)^3 - (x + 2y)
=(x + 2y)^2(x + 2y) - (x + 2y)
=(x + 2y)[(x + 2y)^2 - 1]
=(x + 2y)(x + 2y + 1)(x + 2y - 1)
因式分解：（x+2y)的"立方"-x-2y
因式分解：（x+2y)的"立方"-x-2y
數(shù)學(xué)人氣：926 ℃時(shí)間：2020-01-26 03:09:41
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