Question

Помогите решить 1) (12³-9³):(12-9) 2) (6²+3²

Answer 1

(12³-9³):(12-9)= (12 - 9) (12² + 12*9 + 9²):(12-9)=(12² + 12*9 + 9²)=144+81+108=333

(6²+3²)=(6+3)(6-3)=9*3=27