Diketahui fungsi f(x) = 3x+7. Nilai dari f(-4)-f(8) adalah

f(x) = 3x + 7.
f(-4) = 3(-4) + 7
f(-4) = -12 + 7
f(-4) = - 9

f(x) = 3x+7.
f(8) = 3(8) + 7
f(8) = 24 +7
f(8) = 31

f(-4) - f(8)
-9 - 31
-40

Maaf ya kalo salah

F(-4) = 3.-4 + 7
F (-4) = -12+7
F(-4) = -5

F(8) = 3.8+ 7
F(8) = 24+7
F(8) = 31