Question

multiplique a) 3.(2x + 4) b) (3x - 1).(2x + 3)

Answer 1

Simples, use o "chuveirinho"

a) 6x + 12


b) 3x*2x + 3*3x - 1*2x - 1*3
6x² + 9x - 2x - 3
6x² + 7x - 3

Answer 2

Vamos aplicar a distributiva :

a) 3 . (2x + 4)
6x + 12

b) (3x - 1) . (2x + 3)
6x² + 9x - 2x - 3
6x² + 7x - 3