Simplify x2−1x2+x÷x−1x\frac{x^2-1}{x^2+x} \div \frac{x-1}{x}x2+xx2−1÷xx−1.
1
1x\frac{1}{x}x1
x−1x+1\frac{x-1}{x+1}x+1x−1
x+1x\frac{x+1}{x}xx+1