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
答
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)