Question

f(x)=|-3x+12|
$f(x) = ( - 3 + 12)$

Answer 1

Função de 1 grau

f(x) = -3x + 12
0 = -3x + 12
-3x + 12 = 0
12 = 0 + 3x
12 = 3x
12/3 = x
4 = x

pq:
f(4) = -3.4+12
f(4) = -12 +12
f(4) = 0