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计算分式x-y/x²+xy乘以x²y²-x的四次方/xy-x²

学习时间:2026-09-28 20:25:56 阅读：3513

计算分式x-y/x²+xy乘以x²y²-x的四次方/xy-x²

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柔弱的太阳

危机的白云

2026-09-28 20:25:56

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原式=(x-y)/x(x+y)*[-x²(x²-y²)]/[-x(x-y)]=(x-y)/x(x+y)*x²(x+y)(x-y)/x(x-y)=(x-y)/x(x+y)*x(x+y)=x-y

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危机的毛衣
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2026-09-28 20:25:56
原式=(x-y)/x(x+y)*[-x²(x²-y²)]/[-x(x-y)]=(x-y)/x(x+y)*x²(x+y)(x-y)/x(x-y)=(x-y)/x(x+y)*x(x+y)=x-y

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