a-4/a^2-a-12

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Solution for a-4/a^2-a-12 equation: 


D( a )

a^2 = 0

a^2 = 0

a^2 = 0

1*a^2 = 0 // : 1

a^2 = 0

a = 0

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

a-a-(4/(a^2))-12 = 0

a-a-4*a^-2-12 = 0

-4*a^-2 = 12 // : -4

a^-2 = -3

-2 < 0

1/(a^2) = -3 // * a^2

1 = -3*a^2 // : -3

-1/3 = a^2

a belongs to the empty set

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