Question

Efetue eliminando os parênteses
a) (5x2 – 2x + 3) – (3x2 – 7x + 5) =
b) (12x2 + 9x – 10) – (10x2 + 2x – 7) =
c) (–3x2 – x + 3) – (4x2 + 2x + 1) =
d) (7x2 – 15x) – (– 3x2 + 3x – 9) =
e) (–5x3 + 7x – 1) – (5x2 + 9x – 7) =

Answer 1

Resposta:

a) 5x²-2x+3-3x²+7x-5 = 2x²+5x-2

b) 12x²+9x-10-10x²-2x-1 = 2x²+7x-1

c) -3x²-x+3-4x²-2x-1 = -7x²-3x+2

d) 7x²-15x+3x²-3x+9= 10x²-18x+9

e) -5x²+7x-1+5x²-9x+7 = -2x+6