(8u^4-28u^3)/4u^2

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Solution for (8u^4-28u^3)/4u^2 equation: 


u in (-oo:+oo)

u^2*((8*u^4-(28*u^3))/4) = 0

u^2*((8*u^4-28*u^3)/4) = 0

(u^2*(8*u^4-28*u^3))/4 = 0

8*u^4-28*u^3 = 0

4*u^3*(2*u-7) = 0

2*u-7 = 0 // + 7

2*u = 7 // : 2

u = 7/2

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

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

( 4*u^3 )

4*u^3 = 0 // : 4

u^3 = 0

u = 0

( u-7/2 )

u-7/2 = 0 // + 7/2

u = 7/2

( u^2 )

1*u^2 = 0 // : 1

u^2 = 0

u = 0

u in { 0, 7/2, 0 }

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