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x in (-oo:+oo)
(-1/6)*(x-18)+(1/2)*x*(x+2)+16 = 0
1/2*x*(x+2)-1/6*(x-18)+16 = 0
1/2*x*(x+2)-1/6*(x-18)+16 = 0
1/2*x^2+5/6*x+3+16 = 0
1/2*x^2+5/6*x+19 = 0
1/2*x^2+5/6*x+19 = 0
1/2*x^2+5/6*x+19 = 0
DELTA = (5/6)^2-(1/2*4*19)
DELTA = -1343/36
DELTA < 0
1 = 0
1 = 0
x belongs to the empty set
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