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p>0
2x+1>0
2x>-1
x>-1/2
y= log x ( x2+3x+2)
x>0
x²+3x+2>0
delt=9-4*1*2=1 √delty=1
x1=-3-1/2=-2
x2=-3+1/2=-1
x∈(-∞,-2)U(-1,∞)