Question

Find the value of X:

x^-2=1/16


A. 4 and -4

B. only 4

C. 16 and -16

D. only 16

Answer 1

\[1/4^2=1/16\]

Answer 2

\[\huge x^-2=\frac{1}{16} \rightarrow \frac{1}{x^2}=\frac{1}{16}\]
\[\huge \rightarrow \frac{1}{x^2}=\frac{1}{4^2} \rightarrow \frac{1}{x}=\frac{1}{4}\]
By invertendo x= 4

Answer 3

you can use ^{ -2} as an exponent of -2.