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x in (-oo:+oo)
((x+4)^2)/5-((7*(x+4)^1)/5)+12 = 0
((x+4)^2)/5+(-7/5)*(x+4)+12 = 0
((x+4)^2)/5-7/5*(x+4)+12 = 0
((x+4)^2)/5+(-7/5*5*(x+4))/5+(5*12)/5 = 0
(x+4)^2-7/5*5*(x+4)+5*12 = 0
x^2+x-12+60 = 0
x^2+x+48 = 0
x^2+x+48 = 0
x^2+x+48 = 0
DELTA = 1^2-(1*4*48)
DELTA = -191
DELTA < 0
1 = 0
1/5 = 0
1/5 = 0 // * 5
1 = 0
x belongs to the empty set
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