13a-4/a-4

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Solution for 13a-4/a-4 equation: 


D( a )

a = 0

a = 0

a = 0

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

13*a-(4/a)-4 = 0

13*a-4*a^-1-4 = 0

13*a^1-4*a^-1-4*a^0 = 0

(13*a^2-4*a^1-4*a^0)/(a^1) = 0 // * a^2

a^1*(13*a^2-4*a^1-4*a^0) = 0

a^1

13*a^2-4*a-4 = 0

13*a^2-4*a-4 = 0

DELTA = (-4)^2-(-4*4*13)

DELTA = 224

DELTA > 0

a = (224^(1/2)+4)/(2*13) or a = (4-224^(1/2))/(2*13)

a = (4*14^(1/2)+4)/26 or a = (4-4*14^(1/2))/26

a in { (4-4*14^(1/2))/26, (4*14^(1/2)+4)/26} 

a in { (4-4*14^(1/2))/26, (4*14^(1/2)+4)/26 }

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