Question

Dada a função f(x) = x² + x – 6, o valor de f(2) – f(-5) é:
( )-14
( )- 2
( )26
( )14

Answer 1

f(x) = x² + x - 6

f(2) = 2² + 2 - 6

f(2) = 4 + 2 - 6

f(2) = 6 - 6

f(2) = 0

f(-5) = (-5)² + (-5) - 6

f(-5) = 25 - 5 - 6

f(-5) = 25 - 11

f(-5) = 14

f(2) - f(-5) = 0 - (14)

f(2) - f(-5) = - 14

Resposta: - 14