Question

qual a resposta de (x+1).(x+3)

Answer 1

Aplique a distributiva
(x + 1)(x + 3) = x·x + x·3 + 1·x +1·3 = x² + 3x + x + 3 = x² + 4x +3

Answer 2

(x + 1).(x + 3) = x² + 3x + x + 3 = x² + 4x + 3