x+2/x^2-2x减去x-1/x^2-4x+4的差,除以x-4/x 结果

问题描述:

x+2/x^2-2x减去x-1/x^2-4x+4的差,除以x-4/x
结果

原式=(x+2)x/x(x-2)(x-4)-x(x-1)/(x-2)(x-2)(x-4)=(x+2)(x-2)/(x-2)(x-2)(x-4)-(x-1)x/(x-2)(x-2)(x-4),化简通分,得1/(x-2)(x-2)