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D( x )
2*x^2-(3*x) = 0
2*x^2-(3*x) = 0
2*x^2-(3*x) = 0
2*x^2-3*x = 0
2*x^2-3*x = 0
DELTA = (-3)^2-(0*2*4)
DELTA = 9
DELTA > 0
x = (9^(1/2)+3)/(2*2) or x = (3-9^(1/2))/(2*2)
x = 3/2 or x = 0
x in (-oo:0) U (0:3/2) U (3/2:+oo)
(4*x^2-9)/(2*x^2-(3*x)) = 0
(4*x^2-9)/(2*x^2-3*x) = 0
2*x^2-3*x = 0
x*(2*x-3) = 0
2*x-3 = 0 // + 3
2*x = 3 // : 2
x = 3/2
x*(x-3/2) = 0
(4*x^2-9)/(x*(x-3/2)) = 0
4*x^2 = 9 // : 4
x^2 = 9/4
x^2 = 9/4 // ^ 1/2
abs(x) = 3/2
x = 3/2 or x = -3/2
x in { 3/2}
x = -3/2
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