Question

what is and expression equivalent with 7^-5 x 7^8

Answer 1

we are given the following expression:

$7^{-5}\times7^{8^{}}$

We can use the following property of exponents:

$a^{x^{}}\times a^y=a^{x+y}$

That is, we leave the same base and add the exponents, like this:

$undefined$