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x²-3x+2 = (x-1)(x-1)
untuk x=1
2(1)³ - 5(1)² + p(1) + q = 3(1) - 1
2 - 5 + p + q = 2
p + q = 2 - 2 + 5
p + q = 5
untuk x=2
2(2)³ - 5(2)² + p(2) + q = 3(2) - 1
2(8) - 5(4) + 2p + q = 6-1
2p + q = 5 - 16 + 20
2p + q = 9
gunakan metode eliminasi
p + q = 5
2p+q = 9
_______-
-p = -4
p = 4
gunakan metode subtitusi
p + q = 5
4 + q = 5
q = 5-4
q = 1
maka
2p + q
2(4) + 1
8 + 1 = 9
jawabannya 9
semoga berguna +_+