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1.akarnya dikeluarkan.maka dikuadratkan3x+1 < 3-2x
3x+2x < 3-1
5x < 2
x < 2/5
dicek,misal x=0.masukan ke PTS.akar 3.0 + 1 < akar dr 3-0
1 < akar3.memenuhi.
x=-1.maka hasilnya -.tdk memenuhi.jd HP={ 0<=x<2/5}