jika f(x)dibagi(x+2)bersisa 14dandibagi(x-4)bersisa-4,makaf(x)dibagixpangkat2-2x-8bersisa

jawab

dibagi (x+2) sisa 14 → s(-2)= 14
dibagi (x-4) sisa -4  → s(4)= -4
dibagi x² - 2x - 8 sisa s(x)= ax + b
(x -4)(x +2)= 0
x= 4 atau x= - 2
s(4)= - 4
s(-2) = 14
(4 -(-2)) a = -4-14
6a = -18
a = - 3
s(4)= - 4
b = -4 - 4a
b = - 4 - 4(-3)
b = -4 + 12
b = 8
s(x) = ax + b
s(x) = -3x + 8