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y in (-oo:+oo)
y*((y+18)/5) = 2 // - 2
y*((y+18)/5)-2 = 0
(y*(y+18))/5-2 = 0
(y*(y+18))/5+(-2*5)/5 = 0
y*(y+18)-2*5 = 0
y^2+18*y-10 = 0
y^2+18*y-10 = 0
y^2+18*y-10 = 0
DELTA = 18^2-(-10*1*4)
DELTA = 364
DELTA > 0
y = (364^(1/2)-18)/(1*2) or y = (-364^(1/2)-18)/(1*2)
y = (2*91^(1/2)-18)/2 or y = (-2*91^(1/2)-18)/2
(y-((-2*91^(1/2)-18)/2))*(y-((2*91^(1/2)-18)/2)) = 0
((y-((-2*91^(1/2)-18)/2))*(y-((2*91^(1/2)-18)/2)))/5 = 0
((y-((-2*91^(1/2)-18)/2))*(y-((2*91^(1/2)-18)/2)))/5 = 0 // * 5
(y-((-2*91^(1/2)-18)/2))*(y-((2*91^(1/2)-18)/2)) = 0
( y-((-2*91^(1/2)-18)/2) )
y-((-2*91^(1/2)-18)/2) = 0 // + (-2*91^(1/2)-18)/2
y = (-2*91^(1/2)-18)/2
( y-((2*91^(1/2)-18)/2) )
y-((2*91^(1/2)-18)/2) = 0 // + (2*91^(1/2)-18)/2
y = (2*91^(1/2)-18)/2
y in { (-2*91^(1/2)-18)/2, (2*91^(1/2)-18)/2 }
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