作业帮x^2-10x+25/x-1÷x^2-1/5-x
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x^2-10x+25/x-1÷x^2-1/5-x
x^2-10x+25/x-1÷x^2-1/5-x
x^2-10x+25/x-1÷x^2-1/5-x
（x²-10x+25）/（x-1)÷(x²-1)/(5-x)
=(x-5)²/(x-1)÷(x-1)(x+1)/(5-x)
=-(x-5)³/(x-1)²(x+1)
你确认题目没有错吗?
原式=（x-5)^2/(x-1)÷(x^2-1)/(5-x)
=-(x-5)^3/[(x-1)^2*(x+1)]
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x^2-10x+25/x-1÷x^2-1/5-x
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