Question

Simplify 4 -2 (4 to the negative power of 2?)

Answer 1

$a^{-n} = \frac{1}{ a^{n} }$
So, $4-2( 4^{-2})=4-2 \frac{1}{ 4^{2} } = 4-2 \frac{1}{16} = 4- \frac{1}{8}$
We amplify 4 with 8 and we get:
$\frac{32-1}{8} = \frac{31}{8}= 3,875$