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D( y )
4*y^2 = 0
5*y = 0
4*y^2 = 0
4*y^2 = 0
4*y^2 = 0 // : 4
y^2 = 0
y = 0
5*y = 0
5*y = 0
5*y = 0 // : 5
y = 0
y in (-oo:0) U (0:+oo)
3/(4*y^2)-(6/(5*y)) = 0
(-6/5)*y^-1+3/(4*y^2) = 0
3/4*y^-2-6/5*y^-1 = 0
t_1 = y^-1
3/4*t_1^2-6/5*t_1^1 = 0
3/4*t_1^2-6/5*t_1 = 0
DELTA = (-6/5)^2-(0*3/4*4)
DELTA = 36/25
DELTA > 0
t_1 = ((36/25)^(1/2)+6/5)/(3/4*2) or t_1 = (6/5-(36/25)^(1/2))/(3/4*2)
t_1 = 8/5 or t_1 = 0
t_1 = 0
y^-1+0 = 0
y^-1 = 0
1*y^-1 = 0 // : 1
y^-1 = 0
y należy do O
t_1 = 8/5
y^-1-8/5 = 0
1*y^-1 = 8/5 // : 1
y^-1 = 8/5
-1 < 0
1/(y^1) = 8/5 // * y^1
1 = 8/5*y^1 // : 8/5
5/8 = y^1
y = 5/8
y = 5/8
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