Question

6) Sendo f(x) = -- x2 + 2 x + 3, calcule o valor de : a) F(- 1 ) = b) F ( 2 ) =

Answer 1

f(x) = -x² + 2x + 3

a) f(-1) = -(-1)² + 2.(-1) + 3 = -1 - 2 + 3 = -3 + 3 = 0

b) f(2) = -2² + 2.2 + 3 = -4 + 4 + 3 = 3