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X pangkat 2+1X+6X+6=0
X(X+1)+6(X+1)=0
X+6=0 ATAU X+1=0
X=-6 DAN X=-1
AKAR={-6,-1}
b.)-3X pangkat 2-5X+2=0
-3X pangkat 2-6X+1X+2=0
-3X(X+2)+1(X+2)
-3X+1=0 ATAU X+2=0
X=1/3 DAN X=-2