Question

Calcule:

-7-² =


-[-(-5/4)]-² =

Answer 1

$-7^{-2} = (- \frac{1}{7}) ^{2}= \frac{1}{49}$

$-[-(- \frac{5}{4})] ^{-2}= -[+ \frac{5}{4}] ^{-2}= -[ \frac{4}{5}]^2=- \frac{16}{25}$