Question

Resolva a expressão:
(x + 1) . (x + 2) - 2 (x + 3)^2 + (x + 2) . (x + 3)​

Answer 1

Resposta:

(x + 1) . (x + 2) - 2 (x + 3)² + (x + 2) . (x + 3)​

x² + 2x + x + 2 - [2. (x² + 6x + 9) + x² + 3x + 2x + 6)]

(x² + 2x + x + 2) - (2x² + 12x + 18) +  (x² + 3x + 2x + 6)

(-x² - 9x - 16) + (x² + 3x + 2x + 6)

-4x - 10