Question

protudos notaveis: oitavo ano--- (b+c).(b+c)=
a resposta seria b²+bc²+c² 
ou seria b²+2bc+c² ???

Answer 1

$\boxed{(b+c).(b+c)=b^2+2bc+c^2}$

Answer 2

(b+c).(b+c) = b² + 2bc + c²