Question

02) Dada a função f(x) = x2 – 2x – 9, o valor de f(2) +f( 3) é:
(A) 9
(B) 2
(C) -15
(D) -7
(E) 10

Answer 1

Resposta:

F(2) = 2²-2•2-9

F(2) = 4-4-9

F(2) = -9

F(3) = 3²-2•3-9

F(3) = 9-6-9

F(3) = -6

F(2) + F(3) = -9+(-6) = -9-6 = -15

Alternativa C