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y in (-oo:+oo)
y*((3*y-7)/12) = 1/3 // - 1/3
y*((3*y-7)/12)-(1/3) = 0
y*((3*y-7)/12)-1/3 = 0
(y*(3*y-7))/12-1/3 = 0
(3*y*(3*y-7))/(3*12)+(-1*12)/(3*12) = 0
3*y*(3*y-7)-1*12 = 0
9*y^2-21*y-12 = 0
9*y^2-21*y-12 = 0
3*(3*y^2-7*y-4) = 0
3*y^2-7*y-4 = 0
DELTA = (-7)^2-(-4*3*4)
DELTA = 97
DELTA > 0
y = (97^(1/2)+7)/(2*3) or y = (7-97^(1/2))/(2*3)
y = (97^(1/2)+7)/6 or y = (7-97^(1/2))/6
3*(y-((7-97^(1/2))/6))*(y-((97^(1/2)+7)/6)) = 0
(3*(y-((7-97^(1/2))/6))*(y-((97^(1/2)+7)/6)))/(3*12) = 0
(3*(y-((7-97^(1/2))/6))*(y-((97^(1/2)+7)/6)))/(3*12) = 0 // * 3*12
3*(y-((7-97^(1/2))/6))*(y-((97^(1/2)+7)/6)) = 0
( y-((7-97^(1/2))/6) )
y-((7-97^(1/2))/6) = 0 // + (7-97^(1/2))/6
y = (7-97^(1/2))/6
( y-((97^(1/2)+7)/6) )
y-((97^(1/2)+7)/6) = 0 // + (97^(1/2)+7)/6
y = (97^(1/2)+7)/6
y in { (7-97^(1/2))/6, (97^(1/2)+7)/6 }
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