Question

4) Calcule:

a) (+5x) . (-4x²) =

b) (-2x) . (+3x) =

c) (+5x) . (+4x) =

d) (-n) . (+ 6n) =

e) (-6x²) . (+3x²) =​

Answer 1

Resposta:

a) (+5x).(-4x²)=20x³

=>5.(-4)=-20

=>xx²=x³

B) (-2 x).(+ 3 x )= 6x²

=>2.3 = -6

=>x.x=x²

C) (+ 5 x) . (+ 4 x) = +20x²

=>x.x=x²

d) (-n+) (+6n) = - 6n²