Question

Dada a função f(x) = x² - 4.x + 1 determine f(3). *
-5
5
-2
+3
13

Answer 1

$f(x)=x^2-4\cdot x+1$

$f(3)=3^2-4\cdot 3+1$

$f(3)=9-12+1$

$f(3)=-2$