Question

determine o valor da expressão (3d +2)² - (3d - 2)²

A) 0
B) 1
C) 12d
D) 24d
E) -24d

Answer 1

Resposta:

resposta 24d

a res

Explicação passo-a-passo:

filme

Answer 2

Resposta: D)

(3d +2)² - (3d + 2)² - 1 (3d - 2)²

3d ( 3d + 2) + 2 ( 3d + 2 ) - 1 (3d - 2)²

9d² + 6d + 2 (3d + 2 ) - 1 (3d - 2)²

9d² + 6d + 6d + 4 - 1 (3d - 2)²

9d² + 12d + 4 - 1 (3d - 2)²

9d² + 12d + 4 - 1 (3d - 2) (3d - 2)

9d² + 12d - 1 (3d ( 3d - 2) - 2 (3d - 2))

9d² + 12d + 4 - 1 (9d² - 6d - 2 (3d - 2))

9d² + 12d + 4 - 1 (9d² - 6d - 6d - 6d + 4)

9d² + 12 + 4 - 1 (9d² - 12d + 4 )

9d² + 12d + 4 - 9d² + 12d - 4

9d² + 12d - 9d² + 12d

12d + 12d

24d