4x方y/(x-2y)(x+2y)怎么算[x方/x-2y]-4x方y/(x-2y)(x+2y)=?
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4x方y/(x-2y)(x+2y)怎么算[x方/x-2y]-4x方y/(x-2y)(x+2y)=?4x方y/(x-2y)(x+2y)怎么算[x方/x-2y]-4x方y/(x-2y)(x+2y)=?4x
4x方y/(x-2y)(x+2y)怎么算[x方/x-2y]-4x方y/(x-2y)(x+2y)=?
4x方y/(x-2y)(x+2y)怎么算
[x方/x-2y]-4x方y/(x-2y)(x+2y)=?
4x方y/(x-2y)(x+2y)怎么算[x方/x-2y]-4x方y/(x-2y)(x+2y)=?
x^2/(x-2y) -4x^2y/(x-2y)(x+2y)
=[x^2(x+2y)-4x^2y]/(x-2y)(x+2y)
=x^2(x+2y-4y)/(x-2y)(x+2y)
=x^2(x-2y)/(x-2y)(x+2y)
=x^2/(x+2y)
通分
原式=x²(x+2y)/(x-2y)(x+2y)-4x²y/(x-2y)(x+2y)
=(x³+2x²y-4x²y)/(x-2y)(x+2y)
=(x³-2x²y)/(x-2y)(x+2y)
=x²(x-2y)/(x-2y)(x+2y)
=x²/(x+2y)
4x方y/(x-2y)(x+2y)怎么算[x方/x-2y]-4x方y/(x-2y)(x+2y)=?
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