Question

Sendo P = x 2 + 12x – 9 e Q = – 8x2 + 7x – 1, determine: a) P – Q b) P + Q

Answer 1

Resposta:

Explicação passo-a-passo:

P = x² + 12x - 9

Q = - 8x² + 7x - 1

a) P - Q =

(x² + 12x - 9) - ( - 8x² + 7x - 1) =

x² + 12x - 9 + 8x² - 7x + 1 =

9x² + 5x - 8

b) P + Q =

(x² + 12x - 9) + (-8x² + 7x -1) =

x² + 12x - 9 - 8x² + 7x - 1 =

- 7x² + 19x - 10