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D( x )
2*x+3 = 0
2*x+3 = 0
2*x+3 = 0
2*x+3 = 0 // - 3
2*x = -3 // : 2
x = -3/2
x in (-oo:-3/2) U (-3/2:+oo)
(4*x-11)/(2*x+3) = y // - y
(4*x-11)/(2*x+3)-y = 0
(4*x-11)/(2*x+3)+(-y*(2*x+3))/(2*x+3) = 0
4*x-y*(2*x+3)-11 = 0
4*x-2*x*y-3*y-11 = 0
(4*x-2*x*y-3*y-11)/(2*x+3) = 0
(4*x-2*x*y-3*y-11)/(2*x+3) = 0 // * 2*x+3
4*x-2*x*y-3*y-11 = 0
-2*x*y-3*y-11 = 0 // + -3*y-11
-2*x*y = -(-3*y-11) // : -2*y
x = (-(-3*y-11))/(-2*y)
x = (11-(-3*y))/(-2*y)
x = (11-(-3*y))/(-2*y)
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