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D( y )
2*y+1 = 0
2*y+1 = 0
2*y+1 = 0
2*y+1 = 0 // - 1
2*y = -1 // : 2
y = -1/2
y in (-oo:-1/2) U (-1/2:+oo)
(6*y^2-5*y-2)/(2*y+1) = 0
6*y^2-5*y-2 = 0
6*y^2-5*y-2 = 0
DELTA = (-5)^2-(-2*4*6)
DELTA = 73
DELTA > 0
y = (73^(1/2)+5)/(2*6) or y = (5-73^(1/2))/(2*6)
y = (73^(1/2)+5)/12 or y = (5-73^(1/2))/12
(y-((5-73^(1/2))/12))*(y-((73^(1/2)+5)/12)) = 0
((y-((5-73^(1/2))/12))*(y-((73^(1/2)+5)/12)))/(2*y+1) = 0
( y-((5-73^(1/2))/12) )
y-((5-73^(1/2))/12) = 0 // + (5-73^(1/2))/12
y = (5-73^(1/2))/12
( y-((73^(1/2)+5)/12) )
y-((73^(1/2)+5)/12) = 0 // + (73^(1/2)+5)/12
y = (73^(1/2)+5)/12
y in { (5-73^(1/2))/12, (73^(1/2)+5)/12 }
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