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a. 2 -5 -2 13 -9
1| v 2 -3 -5 8
_____________+
2 -3 -5 8 -1
h(x) = 2x³-3x²-5x+8 s(x)=-1
b. 2 -5 -2 13 9
-3/2| v -3 12 -15 3
_________________+
2 -8 10 -2 -6
f(x)=(x+3/2)(2x³-8x²+10x-2)-6
=(x+3/2)2(x³-4x²+5x-1)-6
=(2x+3)(x³-4x²+5x-1)-6
h(x) = x³-4x²+5x-1 s(x)=-6
c.h(x) jawaban a : (2x+3)
2 -3 -5 8
3/2|v -3 9 -6
______________+
2 -6 10 2
f(x)=(x-1)[(2x+3)(2x²-6x-4)+2]-1
=(x-1)(2x+3)(2x²-6x-4)+2x-2-1
h(x) = 2x²-6x-4
s(x) = 2x-3
13.
2 5 -p 3
-1|v -2 -3 p+3
_______________+
2 3 -p-3 0
p+3+3=0
p=-6
-p-3 = -(-6)-3=3
2x²-3x+3 -> akar irrasional
14.
p(x) = (x-2)(x+1).h(x)+5x-7
p(x) = (x+2).h(x)+13
(x²-4)=(x+2)(x-2)
p(-2) = 13 ⇒ -2a+b = 13
p(2) = 5x-7 > 5.2-7 > 3 ⇒2a+b=3
-2a+b=13
2a+b = 3
_________-
-4a = 10
a=-2.5
2a+b=3
5+b=3
b=-2
s(x) = -2.5x+2
maaf ya pengen mbantu tapi yg nomer lain nggak bisa