Question

Efetue os produtos a seguir.
a) x(x + 3) =
b) 2x(x - 2) =
c) (2x + 1). (x + 3) =
d) (3x – 1) · (x + 2) =

Answer 1

Resposta:

a) x(x + 3) = x²+3x

b) 2x(x - 2) =2x²- 4x

c) (2x + 1). (x + 3) = 2x²+ 6x + x + 3 = 2x²+7x+3

d) (3x – 1) · (x + 2) =3x² +6x - x - 2 = 3x² + 5x - 2