Question

alguém me ajuda por favor

Answer 1

A) (a+b)²= (a+b)*(a+b) faz a distributiva= a*a+a*b+b*a+b*b=a²+2ab+b²
B) (a-b)²= (a+b)*(a-b)= a*a-a*b+b*a+b*b= a²-2ab+b²
C) (a+b)³= (a+b)*(a+b)²= (a+b)*(a²+2ab+b²)=a³+2a²b+ab²+ba²+2ab²+b³=a³+3a²b+3ab³+b³
D)(a-b)³= (a+b)*(a-b)²= (a+b)*(a²-2ab+b²)=a³-2a²b+ab²+ba²-2ab²+b³=a³-3a²b+3ab³-b³
E) a²-b²= (a+b)*(a-b)=a²-ab+ba-b²