Question

Solve 4/6^-2 -1/4^-3​

Answer 1

Answer:

$=[ \frac{4}{6}]^{-2} - [\frac{1}{4}] ^{-2}\\\\= [\frac{6}{4}]^{2} - 4^{2} \\\\= \frac{36}{16} - 16$