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(x+8)/(x-1) < 0
saat x-1 < 0 , maka x+8 > 0
x < 1 , maka x > -8
-8 < x < 1
saat x-1 > 0 , maka x+8 < 0
x > 1 , maka x < -8
no solution!
maka: -8 < x < 1
HP = { x | -8 < x < 1 ; x ∈ R }
⇔ [(2x + 7) - (x - 1)] / [x - 1] < 0
⇔{ [x + 8] / [x - 1] } < 0
⇔ x = - 8 dan x = 1
+ + + | - - - - | + + +
___(- 8)__(1)___
∴ HP = { x | - 8 < x < 1, x ∈ R}