此題用到提取公因式
x(x+2)(x-2)-4x^2+8x
=x(x+2)(x-2)-4x(x-2)
=x(x-2)(x+2-4)
=x(x-2)(x-2)
=x(x-2)²
祝學(xué)習(xí)進步
x(x+2)(x-2)-4x^2+8x
x(x+2)(x-2)-4x^2+8x
數(shù)學(xué)人氣：344 ℃時間：2020-03-22 22:15:26
優(yōu)質(zhì)解答
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