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D( x )
x = 0
x = 0
x = 0
x in (-oo:0) U (0:+oo)
(3/2)*x = 5/x-7 // - 5/x-7
(3/2)*x-(5/x)+7 = 0
(3/2)*x-5*x^-1+7 = 0
3/2*x^1-5*x^-1+7*x^0 = 0
(3/2*x^2+7*x^1-5*x^0)/(x^1) = 0 // * x^2
x^1*(3/2*x^2+7*x^1-5*x^0) = 0
x^1
(3/2)*x^2+7*x-5 = 0
(3/2)*x^2+7*x-5 = 0
DELTA = 7^2-(-5*4*(3/2))
DELTA = 79
DELTA > 0
x = (79^(1/2)-7)/(2*(3/2)) or x = (-79^(1/2)-7)/(2*(3/2))
x = (79^(1/2)-7)/3 or x = (-(79^(1/2)+7))/3
x in { (-(79^(1/2)+7))/3, (79^(1/2)-7)/3}
x in { (-(79^(1/2)+7))/3, (79^(1/2)-7)/3 }
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