7/x+2-4/2x-3

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Solution for 7/x+2-4/2x-3 equation: 


D( x )

x = 0

x = 0

x = 0

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

7/x-((4/2)*x)-3+2 = 0

7/x-2*x-3+2 = 0

7*x^-1-2*x^1-1*x^0 = 0

(7*x^0-2*x^2-1*x^1)/(x^1) = 0 // * x^2

x^1*(7*x^0-2*x^2-1*x^1) = 0

x^1

7-2*x^2-x = 0

7-2*x^2-x = 0

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

DELTA = 57

DELTA > 0

x = (57^(1/2)+1)/(-2*2) or x = (1-57^(1/2))/(-2*2)

x = (57^(1/2)+1)/(-4) or x = (1-57^(1/2))/(-4)

x in { (57^(1/2)+1)/(-4), (1-57^(1/2))/(-4)} 

x in { (57^(1/2)+1)/(-4), (1-57^(1/2))/(-4) }

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