Menentukan nilai fungsi f(x):2x – 3x +1 tentukan (f-2)???

f(x)=2x – 3x +1
f(2)= 2(2) – 3(2) + 1
     = 4 – 6 + 1
     = -1
jawabanya -1

F(-2) = 2(-2) – 3(-2) + 1 = -4 + 6 + 1 = 3