.X立方+2Y-X-2X平方Y分解因式
人气:328 ℃ 时间:2019-11-15 07:20:09
解答
x³+2y-x-2x²y
=x*x²-2x²y+2y-x
=x²(x-2y)-(x-2y)
=(x²-1)(x-2y)
=(x-1)(x+1)(x-2y)
就好啦
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