Question

(3x + y)² + 2y²= me ajudem pfv.​

Answer 1

Resposta:

$(3x + y)^{2} + 2y^{2} =$

aplicando: $(a+b)^2 = a^2 + 2ab + b^2$

$9x^2 + 3xy + y^2 + 2y^2\\\\9x^2+ 3xy + 3y^2$