Question

分式计算：(x+2)/(x^2-2x)-(x-1)/(x^2-4x+4)

Answer 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)/(x³-4x²+4x)