Question

Calcule
(a+b) com expoente 2

Answer 1

(a+b)² = 
(a+b)(a+b) = 
a² + ab + ab + b² = 
a² + 2ab + b² 

Bons estudos

Answer 2

(a+b)²=
a²+a.b.2+b²=
a²+2ab+b²