Question

f(x)=x2-2x+5 o valor de f(3)-f(-3)

Answer 1

Resposta:

$f(x) = {x}^{2} - 2x + 5$

calculando f(3):

$f(3) = {3}^{2} - 2 \times 3 + 5 = 9 - 6 + 5$

$f(3) = 8$

calculando f(-3):

$f( - 3) = { (- 3)}^{2} - 2 \times ( - 3) + 5$

$f( - 3) = 9 + 6 + 5 = 20$

calculando f(3)-f(-3):

$f(3) - f( - 3) = 8 - 20 = - 12$