Question

Which expression is equivalent to this?

Answer 1

45x^-10 or 45/x^10

Explanation:

(3x^-4)^2 = 9x^-8

(9x^-8)*(5x^-2) = 45x10^-10

I don't see this answer in the options, but am wondering if the second one, 45/x10 is mistyped and is meant to be 45/x^10, which would be correct.