(y^2-5y/4y)*(5y^2/y^2+2y)

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Solution for (y^2-5y/4y)*(5y^2/y^2+2y) equation: 


D( y )

y^2 = 0

y^2 = 0

y^2 = 0

1*y^2 = 0 // : 1

y^2 = 0

y = 0

y in (-oo:0) U (0:+oo)

(y^2-(((5*y)/4)*y))*(2*y+(5*y^2)/(y^2)) = 0

(y^2+(-5/4)*y^2)*(2*y+(5*y^2)/(y^2)) = 0

-1/4*y^2*(2*y+5) = 0

( -1/4*y^2 )

-1/4*y^2 = 0 // : -1/4

y^2 = 0

y = 0

( 2*y+5 )

2*y+5 = 0 // - 5

2*y = -5 // : 2

y = -5/2

y in { 0} 

y = -5/2

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