x+7/x=-8

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Solution for x+7/x=-8 equation: 


D( x )

x = 0

x = 0

x = 0

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

x+7/x = -8 // + 8

x+7/x+8 = 0

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

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

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

x^1

x^2+8*x+7 = 0

x^2+8*x+7 = 0

DELTA = 8^2-(1*4*7)

DELTA = 36

DELTA > 0

x = (36^(1/2)-8)/(1*2) or x = (-36^(1/2)-8)/(1*2)

x = -1 or x = -7

x in { -7, -1} 

x in { -7, -1 }

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