## College Algebra 7th Edition

$\dfrac{1}{144}$
Evaluate the given expression by substituting the given values of the variable to obtain: $=(3 \cdot 4)^{2(-1)} \\=12^{-2}$ Use the rule $a^{-m} = \dfrac{1}{a^m}, a\ne0$ to obtain: $=\dfrac{1}{12^2} \\=\dfrac{1}{144}$