计算:1-2x+x^2/x-x^3*xy+x^2y/x-x^2
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计算:1-2x+x^2/x-x^3*xy+x^2y/x-x^2
计算:1-2x+x^2/x-x^3*xy+x^2y/x-x^2
计算:1-2x+x^2/x-x^3*xy+x^2y/x-x^2
原式=(1-x)^2/x(1-x^2) * xy(x+1)/x(1-x)
=(1-x)/x(1+x)(1-x) *y(x+1)
=y/x
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原式=[-(x²-2x+1)/x(x²-1)]*xy(1+x)/[-x(x-1)]
=-(x-1)²/x(x+1)(x-1)*[-xy(x+1)/x(x-1)]
=(x-1)/x(x+1)*y(x+1)/(x-1)
=y/x
(1-2x+x^2)/(x-x^3)*(xy+x^2*y)/(x-x^2)
=(1-x)^2/x(1-x^2) * xy(1+x)/x(1-x)
=(1-x)^2/x(1-x)(1+x) * xy(1+x)/x(1-x)
=(1-x)xy(1+x)/x(1+x)x(1-x)
=y
这道题是因式分解题对吧
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