Question

$\frac{x^{2} -1}{5x} / \frac{x+1}{x^{2}}$

Answer 1

$\frac{x^{2}-1 }{5x}:\frac{x+1}{x^{2}}=\frac{(x-1)(x+1)}{5x}*\frac{x^{2}}{x+1}=\frac{x(x-1)}{5}$