-20+25/x=-4x

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Solution for -20+25/x=-4x equation: 


D( x )

x = 0

x = 0

x = 0

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

25/x-20 = -4*x // + -4*x

25/x-(-4*x)-20 = 0

4*x+25/x-20 = 0

4*x^1+25*x^-1-20*x^0 = 0

(4*x^2-20*x^1+25*x^0)/(x^1) = 0 // * x^2

x^1*(4*x^2-20*x^1+25*x^0) = 0

x^1

4*x^2-20*x+25 = 0

4*x^2-20*x+25 = 0

DELTA = (-20)^2-(4*4*25)

DELTA = 0

x = 20/(2*4)

x = 5/2 or x = 5/2

x in { 5/2, 5/2} 

x in { 5/2, 5/2 }

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