Question

(K+1) (k+2)
(4g-7j) (4g+7j)

Answer 1

Resposta:

(K+1) (k+2)

${k}^{2} + 2k + k + 2 \\ {k}^{2} + 3k + 2$

(4g-7j) (4g+7j)

${16g}^{2} + 28gj - 28gj - 49 {j}^{2} \\ {16g}^{2} - {49j}^{2}$