Question

Simplify: -9^-2
a. 81
b. -3
c. 4.5
d. 18
e. none of these

Answer 1

\(\large \bf a^{-{\color{red} n}} = \cfrac{1}{a^{\color{red} n}}\qquad thus -9^{-{\color{red}{ 2}}}\implies \square ?\)

Answer 2

I don't think the answer is here

Answer 3

what did you get ?

Answer 4

-9^-2 = 81

Answer 5

-9 * -9 = 81