Question

Considere os polinomios abaixo
A) x2 +3x +3
B) 3x2 -2x -1
C) -x2 - x + 2
Calcule
A) A+B+C
B) A-B+C
C) C-B+A

Answer 1

A)

$A + B +C = (x^2+3x+3)+(3x^2-2x-1)+(-x^2-x+2)=\\x^2+3x+3+3x^2-2x-1-x^2-x+2 = \\x^2+3x^2-x^2+3x-2x-x+3-1+2=\\3x^2+4$

B)

$A - B +C = (x^2+3x+3)-(3x^2-2x-1)+(-x^2-x+2)=\\x^2+3x+3-3x^2+2x+1-x^2-x+2 = \\x^2-3x^2-x^2+3x+2x-x+3+1+2=\\-3x^2+4x+6$

C)

$C-B+A = (-x^2-x+2)-(3x^2-2x-1)+(x^2+3x+3)=\\-x^2-x+2-3x^2+2x+1+x^2+3x+3=\\-x^2-3x^2+x^2-x+2x+3x+2+1+3=\\-3x^2+4x+6$

Answer 2

Resposta:

a) 3x2 + 4

b)3x2+4x+6

c)3x2+4x+6

Explicação passo-a-passo:

Só fazer as operaçoes que mandam e somar ou subtrair tudo