Jawabanmu

2014-05-31T12:30:41+07:00
P(x) =2x⁴+ax³-3x²+5x+b
P(x) : (x-1) = P(1) = 11
P(1) = 2 + a - 3 + 5 + b =11
=a+b = 7

P(-1) = 2 -a -3 -5 + b = -1
=-a + b = 5

Eleminasi...
a = 1
b = 6

2.1 - 6 = -4

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