Question

realiza los desarrollos del sig. producto notable: (a+2b)²

Answer 1

$(a+2b)^2= \\ \\ (a+2b)(a+2b)= \\ \\ a(a+2b)+2b(a+2b)= \\ \\ a^2+2ab+2ab+4b^2= \\ \\ \boxed{a^2+4ab+4b^2}$