If a^3 = x^2

what is a^2y+1 = x^6, solving for y

You would have
(x2)3 = x6 = a9
so 9 = 2y+1
Do you see why?

do u mean

a^(2y) + 1 = x^6

or

a^2 * y + 1 = x^6

a^(2y+1) = x^6