Question

Questão 7. Dada a função f (x) = – x² + 2.x, calcule f(-3/2). (A)f(-3/2) = - 20/5 (B) f(-3/2) = – 18/5 (C)f(-3/2) = 15/2 (D)f (-3/2) = - 21/4 (E) n.d.a.​

Answer 1

f(-2) = (-2)^2 + 2x(-2) -3

f(-2) = 4 - 4 -3

f(-2) = -3

f(-3) = (-3)^2 + 2x(-3) -3

f(-3) = 9 - 6 - 3

f(-3) = 0

f(2) = (2)^2 + 2x(2) -3

f(2) = 4 + 4 -3

f(2) 5