x的3次方减2x的平方－x＋2＋x的5次方－2x的四次方因式分解
人气：480 ℃ 时间：2019-09-04 05:46:18
解答
x³-2x²-x+2+x^5-2x^4
=x^4(x-2)+x²(x-2)-(x-2)
=(x-2)(x^4+x²-1)
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