((28y^4-12y^3)/(4y^2))

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Solution for ((28y^4-12y^3)/(4y^2)) equation: 


D( y )

4*y^2 = 0

4*y^2 = 0

4*y^2 = 0

4*y^2 = 0 // : 4

y^2 = 0

y = 0

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

(28*y^4-(12*y^3))/(4*y^2) = 0

(28*y^4-12*y^3)/(4*y^2) = 0

28*y^4-12*y^3 = 0

4*y^3*(7*y-3) = 0

7*y-3 = 0 // + 3

7*y = 3 // : 7

y = 3/7

4*y^3*(y-3/7) = 0

(4*y^3*(y-3/7))/(4*y^2) = 0

( 4*y^3 )

4*y^3 = 0 // : 4

y^3 = 0

y = 0

( y-3/7 )

y-3/7 = 0 // + 3/7

y = 3/7

y in { 0} 

y = 3/7

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