Question

Thực hiện phép tính

Answer 1

\(=\dfrac{4-6x+x^2+2x}{2\left(x-2\right)\left(x+2\right)}=\dfrac{\left(x-2\right)^2}{2\left(x-2\right)\left(x+2\right)}=\dfrac{x-2}{2\left(x+2\right)}\)