Jawabanmu

2014-09-10T21:06:08+07:00
F(1) = 4
f(2) = 5
f(x) = (HasilBagi)(x²-3x+2) + ax + b
=(HasilBagi)(x-2)(x-1) + ax + b
f(2) = 5
 (HasilBagi)(2-2)(2-1) + 2a + b = 5
 2a + b = 5
f(1) = 4
(HasilBagi)(1-2)(1-1) a + b = 4
a + b = 4

2a + b = 5
a+ b = 4
--ELIMINASI--
Didapat a = 1 dan b = 3
Berarti sisa :
ax + b = x + 3

Semoga membantu.