a-6/a+2

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Solution for a-6/a+2 equation: 


D( a )

a = 0

a = 0

a = 0

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

a-(6/a)+2 = 0

a-6*a^-1+2 = 0

1*a^1-6*a^-1+2*a^0 = 0

(1*a^2+2*a^1-6*a^0)/(a^1) = 0 // * a^2

a^1*(1*a^2+2*a^1-6*a^0) = 0

a^1

a^2+2*a-6 = 0

a^2+2*a-6 = 0

DELTA = 2^2-(-6*1*4)

DELTA = 28

DELTA > 0

a = (28^(1/2)-2)/(1*2) or a = (-28^(1/2)-2)/(1*2)

a = (2*7^(1/2)-2)/2 or a = (-2*7^(1/2)-2)/2

a in { (-2*7^(1/2)-2)/2, (2*7^(1/2)-2)/2} 

a in { (-2*7^(1/2)-2)/2, (2*7^(1/2)-2)/2 }

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