nomor 7 dengan caranya yahh

jawab
f(x) dibagi (x+1) sisa 2 --> f(-1) =2
2p(-1) - q(1) +8 = 2
-2p - q  = - 6
2p + q = 6 ...(i)

g(x) dibagi (x -3) sisa -3 --> g(3) = -3
(p+q)9 - 2p(3) + 3 = -3
9p+ 9q - 6p = -6
3p + 9q = - 6
p + 3q = - 2 ...(ii)

2p + q= 6 ........kali3
p + 3q = - 2

6p + 3q = 18
p+ 3q = - 2 ...(-)
5p = 20
p= 4

2p+ q = 6
q = 6 - 2p
q = 6 - 2(4)
q = 6-8
q= -2

p + 4q= 4 + 4(-2) =  - 4