Question

-7^-2does anyone know ?

Answer 1

Negative exponents mean that you flip the number upside down

so -7^-2 would become 1/-7^2

-7^2 would be 49

so the answer is 1/49

Answer 2

That simply means this:

$- \frac{1}{ {7}^{2} }$

Which is:

$- \frac{1}{49}$