Question

2) se A = x²+1 e B = -2x²+ x+2, determine:
a) A+B
b) A-B
c) B-A
d) 3.A​

Answer 1

Resposta:

a) (x² + 1) + (-2x² + x + 2)

x² + 1 + -2x² + x + 2

-x² + x + 3

b) (x² + 1) - (-2x² + x + 2)

x² + 1 + 2x² - x - 2

3x² - 1 - x

c) (-2x² + x + 2) - (x² + 1)

-2x² + x + 2 - x² - 1

-3x² + 1 + x

d) 3 . (x² + 1)

3x² + 3