Simplify the expression. Write the result using positive exponents only.
-$- 3 z ^ { - 2 }$
A) $\frac { 9 } { z ^ { 2 } }$
B) $- \frac { 1 } { 9 z ^ { 2 } }$
C) $\frac { 1 } { 9 z ^ { 2 } }$
D) $- \frac { 3 } { \mathrm { z } ^ { 2 } }$

Question

Quizplus · Accepted Answer

To simplify the expression $- 3 z ^ { - 2 }$, we use the rule that $a^{-n} = \frac{1}{a^n}$ for any nonzero base $a$ and any integer $n$. Applying this rule, we get $- 3 z ^ { - 2 } = - \frac{3}{z^2}$.

Simplify the Expression −3z−2- 3 z ^ { - 2 }−3z−2

Simplify the Expression $- 3 z ^ { - 2 }$