(8/c)-c=7

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Solution for (8/c)-c=7 equation: 


D( c )

c = 0

c = 0

c = 0

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

8/c-c = 7 // - 7

8/c-c-7 = 0

8*c^-1-1*c^1-7*c^0 = 0

(8*c^0-1*c^2-7*c^1)/(c^1) = 0 // * c^2

c^1*(8*c^0-1*c^2-7*c^1) = 0

c^1

8-c^2-7*c = 0

8-c^2-7*c = 0

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

DELTA = 81

DELTA > 0

c = (81^(1/2)+7)/(-1*2) or c = (7-81^(1/2))/(-1*2)

c = -8 or c = 1

c in { -8, 1} 

c in { -8, 1 }

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