Diketahui f(x) = |3x + 9|. Tentukan nilai (f(-4) x f(-1) + f(3)/|-3|)

f(x) = |3x+9|
f(-4) = |3 (-4)+9|
= |-3|
f(-1) = |3 (-1)+9|
= |5|
f(3) = |3 (3)+9|
= |18|
(f(-4) x f(-1) + f(-3)/|-3|) = |-3|×|5|+|18|/|-3|
= |-15|+|-6|
= |-21|