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x²+3x-18=0
(x+6)(x-3)=0
x=-6 atau x=3
syarat log
x+5>0. dan. x-2>0
x>-5. x>2
dgn syarat log itu mk yg memenuhi adalah x=3
jd hp={x|x=3}
x-2+x+5. =8
2x+3. =8
x. =5/2