Question

(7a+11b)² ayudaaaaaaaaaaaa​

Answer 1

Usamos ( x + y )² = x² + 2 x y + y²

$(7a {)}^{2} + 2 \times 7a \times 11b + (11b {)}^{2}$

elevamos el factor a la potencia

$49 {a}^{2} + 2 \times 7a \times 11b + (11b {)}^{2}$

calculamos

$49 {a}^{2} + 154ab + (11b {)}^{2}$

elevamos el factor a la potencia

$49 {a}^{2} + 154ab + 121 {b}^{2}$