Question

If 5^x = 7, what does 5^(-2x) equal

Answer 1

i think 1/32

Answer 2

see
5^x = 7 ( given )
5^(-2x) can also be written as 5^(x)^(-2) = 7(-2)
now as we know a^-b = 1/a^(b)
so 7^-2 = 1/7^2 = 1/49

Answer 3

give me medal