(x²-2x)分之(x+2)-(x²-4x+4)分之(x+1) 计算

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(x²-2x)分之(x+2)-(x²-4x+4)分之(x+1) 计算
(x²-2x)分之(x+2)-(x²-4x+4)分之(x+1) 计算

(x²-2x)分之(x+2)-(x²-4x+4)分之(x+1) 计算
(x²-2x)分之(x+2)-(x²-4x+4)分之(x+1)
=(x+2)/x(x-2)-(x+1)/(x-2)²
=(x-2)(x+2)/x(x-2)²-x(x+1)/x(x-2)²
=[x²-4-x²-x]/x(x-2)²
=-(x+4)/x(x-2)²

(x+2)/(x²-2x)-(x+1)/(x²-4x+4)
=(x+2)/[x(x-2)]-(x+1)/(x-2)²
=[(x+2)(x-2)-x(x+1)]/[x(x-2)²]
=(x²-4-x²-x)/[x(x-2)²]
=-(4+x)/[x(x-2)²]
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