Divide: x2+5x+6x+1÷x+3x2−1\frac{x^2 + 5x + 6}{x + 1} \div \frac{x + 3}{x^2 - 1}x+1x2+5x+6÷x2−1x+3
x+2x + 2x+2
(x+2)(x−1)(x + 2)(x - 1)(x+2)(x−1)
x+2x−1\frac{x+2}{x-1}x−1x+2
(x+2)(x2−1)x+3\frac{(x+2)(x^2-1)}{x+3}x+3(x+2)(x2−1)