3²
Hi there !
3⁻⁶ ₓ (3⁴ : 3⁰)² =
= 3⁻⁶ ₓ (3⁴ ⁻ ⁰)²
= 3⁻⁶ ₓ (3⁴)²
= 3⁻⁶ ₓ 3⁸
= 3⁻⁶⁺⁸
= 3²
use
aⁿ : aᵇ = aⁿ ⁻ ᵇ
(aⁿ)ᵇ = aⁿˣᵇ
aⁿ ₓ aᵇ = aⁿ⁺ᵇ
Good luck !
