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Verified answer
X"-2x-8 <0x"-2x-8=0
(x-4)(x+2)=0
x=4 atau x=-2
ttik uji 0
x"-2x-8<0
0"-2.0-8<0
-8 <0
++ ------------ ++
----------------------
-2 4
hp nya yg tanda -
maka hpnya -2 <x <4