Multiply x+2x−1⋅x2−1x+2\dfrac{x+2}{x-1} \cdot \dfrac{x^2-1}{x+2}x−1x+2⋅x+2x2−1.
x+1x + 1x+1
x−1x - 1x−1
111
x2−1x^2 - 1x2−1