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x^3+2x^2y-4X-8y
因式分解
人气:228 ℃ 时间:2020-05-11 15:36:31
解答

x³+2x²y-4x-8y
=x²(x+2y)-4(x+2y)
=(x²-4)(x+2y)
=(x-2)(x+2)(x+2y)
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