7x-8/-x

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Solution for 7x-8/-x equation: 


D( x )

-x = 0

-x = 0

x = 0

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

7*x-(8/(-x)) = 0

7*x+8*x^-1 = 0

7*x^1+8*x^-1 = 0

(7*x^2+8*x^0)/(x^1) = 0 // * x^2

x^1*(7*x^2+8*x^0) = 0

x^1

7*x^2+8 = 0

7*x^2+8 = 0

DELTA = 0^2-(4*7*8)

DELTA = -224

DELTA < 0

x in { } 

x belongs to the empty set

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