Question

2. Resolva as operações com os polinômios: a) (3x3 - 2x2 + x + 1) + (x2 – 2x + 2) = b) (x + 1 - 2x + 3) - (x2 - x + 5) = c) (6x2 – 5x + 3) + (2x2 + 4x - 5) = d) (- 2x2 + 8x – 7) - (4x2 – 3x – 7) = ajuda por favor!!​

Answer 1

Resposta:

a) (3x3 - 2x2 + x + 1) + (x2 – 2x + 2)

$3x^{3} -2x^{2} +x+1+x^{2} -2x+2\\3x^{3} -x^{2} -x+3$

b) (x + 1 - 2x + 3) - (x2 - x + 5) =

$x+1-2x+3-x^{2} +x-5\\-4-x^{2} \\-x^{2} -4$

c) (6x2 – 5x + 3) + (2x2 + 4x - 5) =

$6x^{2} -5x+3+2x^{2} +4x-5\\8x^{2} -x-2$

d) (- 2x2 + 8x – 7) - (4x2 – 3x – 7)

$-2x^{2} +8x-7-4x^{2} +3x+7\\-6x^{2} +11x$