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D( x )
x = 0
x^2 = 0
x = 0
x = 0
x^2 = 0
x^2 = 0
1*x^2 = 0 // : 1
x^2 = 0
x = 0
x in (-oo:0) U (0:+oo)
3/(x^2)-(50/x) = 17 // - 17
3/(x^2)-(50/x)-17 = 0
3/(x^2)-50*x^-1-17 = 0
3*x^-2-50*x^-1-17 = 0
t_1 = x^-1
3*t_1^2-50*t_1^1-17 = 0
3*t_1^2-50*t_1-17 = 0
DELTA = (-50)^2-(-17*3*4)
DELTA = 2704
DELTA > 0
t_1 = (2704^(1/2)+50)/(2*3) or t_1 = (50-2704^(1/2))/(2*3)
t_1 = 17 or t_1 = -1/3
t_1 = -1/3
x^-1+1/3 = 0
1*x^-1 = -1/3 // : 1
x^-1 = -1/3
-1 < 0
1/(x^1) = -1/3 // * x^1
1 = -1/3*x^1 // : -1/3
-3 = x^1
x = -3
t_1 = 17
x^-1-17 = 0
1*x^-1 = 17 // : 1
x^-1 = 17
-1 < 0
1/(x^1) = 17 // * x^1
1 = 17*x^1 // : 17
1/17 = x^1
x = 1/17
x in { -3, 1/17 }
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