Question

Considerando os polinômios:

A= 6x3 + 5x2 – 8 + 15,

B= 2x3 – 6x2 – 9x + 10 e

C= x3 + 7x2 + 9x + 20, calcule.

A + B​

Answer 1

A= 6x3 + 5x2 – 8 + 15 = 7 (4x + 1)

6x ×3 + 5x × 2 - 8 + 15

18x + 5x × 2 - 8 + 15

18x + 10x - 8 + 15

18x + 10x + 7

28x + 7

7(4x + 1)

B= 2x3 – 6x2 – 9x + 10 = -5(3x - 2)

2x × 3 - 6x × 2 - 9x + 10

6x - 6x × 2 - 9x + 10

6x - 12x - 9x + 10

-15x + 10

-5(3x - 2)

C= x3 + 7x2 + 9x + 20 = 26x + 20

x × 3 + 7x × 2 + 9x + 20

3x + 14x + 9 + 20

26x + 20