5/c-7c/4

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Solution for 5/c-7c/4 equation: 


D( c )

c = 0

c = 0

c = 0

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

5/c-((7*c)/4) = 0

(-7/4)*c+5/c = 0

5*c^-1-7/4*c^1 = 0

(5*c^0-7/4*c^2)/(c^1) = 0 // * c^2

c^1*(5*c^0-7/4*c^2) = 0

c^1

(-7/4)*c^2+5 = 0

(-7/4)*c^2+5 = 0

DELTA = 0^2-(4*5*(-7/4))

DELTA = 35

DELTA > 0

c = (35^(1/2)+0)/(2*(-7/4)) or c = (0-35^(1/2))/(2*(-7/4))

c = -2/7*35^(1/2) or c = 2/7*35^(1/2)

c in { -2/7*35^(1/2), 2/7*35^(1/2)} 

c in { -2/7*35^(1/2), 2/7*35^(1/2) }

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