Question

rút gọn

x/x^2-2x -x^2+4x/x^3-4x -2/x^2+2x

Answer 1

\(=\dfrac{x}{x\left(x-2\right)}-\dfrac{x^2+4x}{x\left(x-2\right)\left(x+2\right)}-\dfrac{2}{x\left(x+2\right)}\)

\(=\dfrac{-4x+4}{x\left(x-2\right)\left(x+2\right)}\)