Diketahui f(x)=5x+a dan f(-3)= -4.Nilai f(2)+3f(-5)=...

f(x) = 5x + a
f(-3) = -4
-4 = 5(-3) + a
-4 = -15 + a
-4 + 15 = a
11 = a
jadi nilai a = 11
f(2) = 5(2) + 11
= 10 + 11 = 21
f(-5) = 5(-5) + 11
= -25 + 11 = -14
maka:
f(2) + 3 f(-5) = 21 + 3(-14)
= 21 + (-42) = -21

**coba diteliti lagi siapa tau salah ngitung