Multiply $\frac{x-2}{\left(x-1\right)\left(x+1\right)}$ times $\frac{x+1}{x-2}$ by multiplying numerator times numerator and denominator times denominator.
Multiply $\frac{x-2}{\left(x-1\right)\left(x+1\right)}$ times $\frac{x+1}{x-2}$ by multiplying numerator times numerator and denominator times denominator.