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D( x )
(0.25-(0.5*x))*(0.75-(1.5*x))^3 = 0
(0.25-(0.5*x))*(0.75-(1.5*x))^3 = 0
(0.25-(0.5*x))*(0.75-(1.5*x))^3 = 0
(0.25-0.5*x)*(0.75-1.5*x)^3 = 0
( 0.25-0.5*x )
0.25-0.5*x = 0 // - 0.25
-0.5*x = -0.25 // : -0.5
x = -0.25/(-0.5)
x = 0.5
( 0.75-1.5*x )
0.75-1.5*x = 0 // - 0.75
-1.5*x = -0.75 // : -1.5
x = -0.75/(-1.5)
x = 0.5
x in (-oo:0.5) U (0.5:+oo)
((2*x)^2)/((0.25-(0.5*x))*(0.75-(1.5*x))^3) = 0
((2*x)^2)/((0.25-0.5*x)*(0.75-1.5*x)^3) = 0
(4*x^2)/((0.25-0.5*x)*(0.75-1.5*x)^3) = 0
4*x^2 = 0 // : 4
x^2 = 0
x = 0
x = 0
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