Question

03) Sendo a função f(x) = -x2 + 2x + 3 substitua em f(x) os valores: {-2, - 1,0, 1, 2}.

Answer 1

f(x) = -x² + 2x + 3

f(-2) = (-2)² + 2 . (-2) + 3

f(-2) = 4 + (-4) + 3

f(-2) = 4 - 4 + 3

f(-2) = 3

f(-1) = (-1)² + 2 . (-1) + 3

f(-1) = 1 + (-2) + 3

f(-1) = 1 - 2 + 3

f(-1) = 2

f(0) = - 0² + 2 . 0 + 3

f(0) = 0 + 0 + 3

f(0) = 3

f(1) = - (1)² + 2 . 1 + 3

f(1) = - 1 + 2 + 3

f(1) = 4

f(2) = - (2)² + 2 . 2 + 3

f(2) = - 4 + 4 + 3

f(2) = 3