Question

A). (a+3x)2 quadrado=

Answer 1

Resposta:

$(a + 3x {)}^{2} = {(a + 3x)}.(a+ {3x)} \\ = a(a + 3x) + 3x(a + 3x) \\ = {a}^{2} + 3ax + 3ax + (3x) ^{2} \\ = {a}^{2} + 6ax + 9x^{2}$