A=\(\dfrac{x\left(x-2\right)\left(x+2\right)}{\left(x-2\right)\left(x+2\right)}\)-\(\dfrac{x\left(x+2\right)}{\left(x-2\right)\left(x+2\right)}\)-\(\dfrac{2\left(x-2\right)}{\left(x-2\right)\left(x+2\right)}\)
A=\(\dfrac{x^3-4x-x^2-2x-2x+4}{\left(x-2\right)\left(x+2\right)}\)
A=\(\dfrac{x^3-x^2-8x+4}{\left(x-2\right)\left(x+2\right)}\)