CPM Homework Help : A2C Problem 12-186

Rewrite the expression $\left(x^{−2} − 5y^{−1}\right)^{−1}$ so that it does not have negative exponents.

Hint:

$x^{-1}=\frac{1}{x}$

More Help:

$x^{-2}=\frac{1}{x^2}\text{ and }5y^{-1}=\frac{5}{y}$

Answer:

$\frac{x^2y}{y-5x^2}$