x的平方-2x+1分之x²-1+x-2分之2x-x²除以x
问题描述：
x的平方-2x+1分之x²-1+x-2分之2x-x²除以x
答
154x3.4-3.4x81
=(27+154-81)x3.4
=100x3.4
答
x的平方-2x+1分之x²-1+x-2分之2x-x²除以x
=（x+1）（x-1）/（x-1）²-x(x-2)/(x-2)÷x
=（x+1）/(x-1)-1
=(x+1-x+1)/(x-1)
=2/(x-1)
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