x^2-2/5x=4/25

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Solution for x^2-2/5x=4/25 equation: 


x in (-oo:+oo)

x^2-((2/5)*x) = 4/25 // - 4/25

x^2-((2/5)*x)-(4/25) = 0

x^2+(-2/5)*x-4/25 = 0

x^2-2/5*x-4/25 = 0

DELTA = (-2/5)^2-(-4/25*1*4)

DELTA = 4/5

DELTA > 0

x = ((4/5)^(1/2)+2/5)/(1*2) or x = (2/5-(4/5)^(1/2))/(1*2)

x = ((4/5)^(1/2)+2/5)/2 or x = (2/5-(4/5)^(1/2))/2

x in { (2/5-(4/5)^(1/2))/2, ((4/5)^(1/2)+2/5)/2 }

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