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P(2) = 2.2³ + 3.2² - 2 + n
25 = 16 + 12 - 2 + n
25 = 26 + n
n = -1
P(x) =2x³+3x²-x - 1
P(x) dibagi (x + 1) sisa ==>
P(-1) = 2.(-1)³+3(-1)²-(-1) -1 = -2 + 3 + 1 - 1 = 1