Question

Dada a função F(x)= x ao quadrado-5x+6, determine:

a) F(1)+F(0) - F(2)

b) F(3)-F(-1)+F( -2)

Answer 1

F(x) = x² - 5x + 6
a) F(1) = (1)² -5(1) + 6  ->  2
    F(0) = (0)² - 5(0) + 6 ->  6
    F(2) =(2)² - 5(2) + 6 ->   0
2 + 6 - 0  = 8

b) F(3) = (3)² -5(3) + 6 -> 0
    F(-1) = (-1)² - 5(-1) +6 -> 12
    F(-2) = (-2)² - 5(-2) + 6 -> 20
0 - 12 + 20 = 8

Answer 2

F(x) = x² - 5x + 6
a) F(1) = (1)² -5(1) + 6  ->  2
    F(0) = (0)² - 5(0) + 6 ->  6
    F(2) =(2)² - 5(2) + 6 ->   0
2 + 6 - 0  = 8

b) F(3) = (3)² -5(3) + 6 -> 0
    F(-1) = (-1)² - 5(-1) +6 -> 12
    F(-2) = (-2)² - 5(-2) + 6 -> 20
0 - 12 + 20 = 8