Question

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

Answer 1

f(x) = x² - x + 3

f(- 2) = (- 2)² - (- 2) + 3

...........= 4 + 2 + 3

...........= 11.........( resposta )

Obs.:...caso x2 = 2.x,.....f(- 2) = 2.(- 2) - (- 2) + 3 = - 4 + 4 + 3 = 3.