Question

01) Resolva os produtos notáveis
a) ( 7x + 3 )²​

Answer 1

${(7x + 3)}^{2} \\ (7x + 3) \times (7x + 3)$

$7x \times 7x + 7x \times 3 + 3 \times 7x + 3 \times 3$

${49x}^{2} + 21x + 21x + 9$

${49x}^{2} + 42x + 9$

Answer 2

( 7x + 3 )²

(7x)² + 2.(7x).(3) + (3)²

49x² + 42x + 9