Diketahui fungsi f(x)= 3x-8 dan g(x) = 4-5x maka nilai dati f(-2) - g(3) adalah?

Mapel : Matematika
Bab : Fungsi

Diketahui :
f(x) = 3x - 8
g(x) = 4 - 5x

Ditanyakan :
Nilai f(-2) - g(3) = ...  ?

Penyelesaian :
f(x) = 3x - 8
f(-2) = 3(-2) - 8
f(-2) = -6 - 8
f(-2) = -14

g(x) = 4 - 5x
g(3) = 4 - 5(3)
g(3) = 4 - 15
g(3) = -11

f(-2) - g(3)
= -14 - (-11)
= -14 + 11
= -3

Jadi, nilai f(-2) - g(3) adalah -3

Soal
f(x) = 3x - 8
g(x) = 4 - 5x
maka f(-2) - g(3) = ...

Penyelesaian
f(-2) - g(3)
= (3(-2) - 8) - (4 - 5(3))
= (-6 - 8) - (4 - 15)
= (-14) - (-11)
= -3