Làm sao để seen Link trang cá nhân của mình vạy ạ 

a) \(\dfrac{2\left(x+1\right)^2}{4x\left(x+1\right)}\) = \(\dfrac{2\left(x+1\right)^2:2\left(x+1\right)}{4x\left(x+1\right):2\left(x+1\right)}\) = \(\dfrac{x+1}{2x}\)

c) \(\dfrac{\left(8-x\right)\left(-x-2\right)}{\left(x+2\right)^2}\) = \(\dfrac{\left(8-x\right)\left[-\left(x+2\right)\right]}{\left(x+2\right)^2}\) =\(\dfrac{8-x}{x+2}\)