x+2/x²-2x-x-1/x²-4x+4计算

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x+2/x²-2x-x-1/x²-4x+4计算
x+2/x²-2x-x-1/x²-4x+4计算

x+2/x²-2x-x-1/x²-4x+4计算
(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]
=(x-4)/[x(x-2)²]
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原式=(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
=(x-4)(x³-4x²+4x)

(x+2)/(x²-2x) - (x-1)/(x²-4x+4)
=(x+2)/x(x-2) - (x-1)/(x-2)²
=(x²-4)/x(x-2)²-(x²-x)/x(x-2)²
=(x²-4-x²+x)/(x(x-2)²
=(x-4)/(x³-4x²+4x)

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