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f(2)=18
f(x)= (2x²-3x-2). h(x) + (ax+b)
= (2x+1) (x-2)
f(-1/2) = a (-1/2) + b= 3
= -1/2a+b= 3 (pers.1)
f(2)= a(2)+b=18
= 2a+b=18 (pers.2)
2a +b=18
-1/2a+b=3
(subsitusikan)
5/2a= 15
a=6 => b= 18-2(6)
b= 6
s(x)= 6x + 6