Question

Dados:
A = x 2 + 3x + 3
B = 3x 2 − 2x − 1
C = −x 2 − x + 1
Calcule: a)
A – B – C =
b) A + (B – C) =

Answer 1

Explicação passo-a-passo:

a) x²+3x +3 - (3x²-2x -1) - (-x²-x +1)=

x² +3x +3 -3x² +2x +1 +x² + x - 1=

x² -3x² +x² +3x +2x + x +3 +1 -1=

2x²-3x² + 6x +3=

- 1x² +6x +3

b) x²+3x +3 + [3x²-2x-1 - ( - x² - x +1)]=

x² +3x +3 + [ 3x² -2x - 1 +x² +x - 1]=

x² +3x +3 + [ 4x² - 1x - 2]=

x² +3x +3 +4x² -x -2=

5x² +2x +1