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D( x )
2-x = 0
2-x = 0
2-x = 0
2-x = 0 // - 2
-x = -2 // * -1
x = 2
x in (-oo:2) U (2:+oo)
2.025 = x/(2-x) // - x/(2-x)
2.025-(x/(2-x)) = 0
(-1*x)/(2-x)+2.025 = 0
(-1*x)/(2-x)+(2.025*(2-x))/(2-x) = 0
2.025*(2-x)-1*x = 0
4.05-3.025*x = 0
(4.05-3.025*x)/(2-x) = 0
(4.05-3.025*x)/(2-x) = 0 // * 2-x
4.05-3.025*x = 0
4.05-3.025*x = 0 // - 4.05
-3.025*x = -4.05 // : -3.025
x = -4.05/(-3.025)
x = 1.33884298
x = 1.33884298
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