Evaluate (ab)^-2

${(a b)}^{- 2}$

Step 1

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

$\frac{1}{{(a b)}^{2}}$

Step 2

Apply the product rule to $a b$ .

$\frac{1}{a^{2} b^{2}}$