10/x-2x+8

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Solution for 10/x-2x+8 equation: 


D( x )

x = 0

x = 0

x = 0

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

10/x-(2*x)+8 = 0

10/x-2*x+8 = 0

10*x^-1-2*x^1+8*x^0 = 0

(8*x^1-2*x^2+10*x^0)/(x^1) = 0 // * x^2

x^1*(8*x^1-2*x^2+10*x^0) = 0

x^1

8*x-2*x^2+10 = 0

8*x-2*x^2+10 = 0

DELTA = 8^2-(-2*4*10)

DELTA = 144

DELTA > 0

x = (144^(1/2)-8)/(-2*2) or x = (-144^(1/2)-8)/(-2*2)

x = -1 or x = 5

x in { -1, 5} 

x in { -1, 5 }

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