Question

A square + 4 a b + 3 b square

Answer 1

Answer:

${a}^{2} + 4ab + 3 {b}^{2} \\ = {a}^{2} + ab + 3ab + 3 {b}^{2} \\ = a(a + b) + 3b(a + b) \\ = (a + b)(a + 3b)$