Simplify x^0y^-2

$x^{0} y^{- 2}$

Anything raised to $0$ is $1$ .

$1 y^{- 2}$

Multiply $y^{- 2}$ by $1$ .

$y^{- 2}$

Rewrite the expression using the negative exponent rule $b^{- n} = \frac{1}{b^{n}}$ .

$\frac{1}{y^{2}}$