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y in (-oo:+oo)
y*((2*y-91)/2) = 1/14 // - 1/14
y*((2*y-91)/2)-(1/14) = 0
y*((2*y-91)/2)-1/14 = 0
(y*(2*y-91))/2-1/14 = 0
(14*y*(2*y-91))/(2*14)+(-1*2)/(2*14) = 0
14*y*(2*y-91)-1*2 = 0
28*y^2-1274*y-2 = 0
28*y^2-1274*y-2 = 0
2*(14*y^2-637*y-1) = 0
14*y^2-637*y-1 = 0
DELTA = (-637)^2-(-1*4*14)
DELTA = 405825
DELTA > 0
y = (405825^(1/2)+637)/(2*14) or y = (637-405825^(1/2))/(2*14)
y = (5*16233^(1/2)+637)/28 or y = (637-5*16233^(1/2))/28
2*(y-((637-5*16233^(1/2))/28))*(y-((5*16233^(1/2)+637)/28)) = 0
(2*(y-((637-5*16233^(1/2))/28))*(y-((5*16233^(1/2)+637)/28)))/(2*14) = 0
(2*(y-((637-5*16233^(1/2))/28))*(y-((5*16233^(1/2)+637)/28)))/(2*14) = 0 // * 2*14
2*(y-((637-5*16233^(1/2))/28))*(y-((5*16233^(1/2)+637)/28)) = 0
( y-((5*16233^(1/2)+637)/28) )
y-((5*16233^(1/2)+637)/28) = 0 // + (5*16233^(1/2)+637)/28
y = (5*16233^(1/2)+637)/28
( y-((637-5*16233^(1/2))/28) )
y-((637-5*16233^(1/2))/28) = 0 // + (637-5*16233^(1/2))/28
y = (637-5*16233^(1/2))/28
y in { (5*16233^(1/2)+637)/28, (637-5*16233^(1/2))/28 }
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