2a-5/a

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Solution for 2a-5/a equation: 


D( a )

a = 0

a = 0

a = 0

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

2*a-(5/a) = 0

2*a-5*a^-1 = 0

2*a^1-5*a^-1 = 0

(2*a^2-5*a^0)/(a^1) = 0 // * a^2

a^1*(2*a^2-5*a^0) = 0

a^1

2*a^2-5 = 0

2*a^2-5 = 0

DELTA = 0^2-(-5*2*4)

DELTA = 40

DELTA > 0

a = (40^(1/2)+0)/(2*2) or a = (0-40^(1/2))/(2*2)

a = (1*10^(1/2))/2 or a = (-10^(1/2))/2

a in { (-10^(1/2))/2, (1*10^(1/2))/2} 

a in { (-10^(1/2))/2, (1*10^(1/2))/2 }

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