³log(X²+13x+15)-³log(2X+1)=2 maka nilai X=
Matematika
vivin82
Pertanyaan
³log(X²+13x+15)-³log(2X+1)=2 maka nilai X=
1 Jawaban
-
1. Jawaban francescotb142
³log(x²+13x+15/2x+1)=³log9
x²+13x+15/2x+1=9
x²+13x+15=9(2x+1)
x²+13x+15=18x+9
x²-5x+6=0
(x-3)(x-2)=0
x=3 , 2