Verified answer

Свойства степеней:

(aⁿ)ˣ = аⁿˣ, (ab)ⁿ = aⁿbⁿ, aⁿ · аˣ = аⁿ⁺ˣ.

1) -2а⁷b · (-3a⁴b⁹) = 6а¹¹b¹⁰;

2) (-3a³b²)⁴ = (-3)⁴ · (a³)⁴ · (b²)⁴ = 81a¹²b⁸.