Question

4) dada a função f (x)=x2-5x+4 calcule f (3) e f (-3)​

Answer 1

Resposta:

$f(x) = x {}^{2} - 5x + 4$

$f(3) = 3 {}^{2} - 5 \times 3 + 4$

$f(3) = 9 - 15 + 4$

$f(3) = -2$

$f( - 3) = - 3 {}^{2} - 5 \times ( - 3) + 4$

$f( - 3) = - 9 - 15 + 4$

f(-3)=10