Question

Simplify. Your answer should contain only positive exponents.

Answer 1

when combining exponents here are the rules

(x^a)(x^b) = x^(a + b)

and

(x^a)^b = x^(a × b)

so in your case

(7x^2)^4 = (7^4)(x^(2 × 4))

which reduces to 2401x^8

Answer 2

i think the answer is 28