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((2*x-3)^2)/3-(((3*x)^1)/3) = 0
((2*x-3)^2)/3-x = 0
((2*x-3)^2)/3+(3*(-x))/3 = 0
(2*x-3)^2+3*(-x) = 0
4*x^2-15*x+9 = 0
4*x^2-15*x+9 = 0
4*x^2-15*x+9 = 0
DELTA = (-15)^2-(4*4*9)
DELTA = 81
DELTA > 0
x = (81^(1/2)+15)/(2*4) or x = (15-81^(1/2))/(2*4)
x = 3 or x = 3/4
(x-3/4)*(x-3) = 0
((x-3/4)*(x-3))/3 = 0
((x-3/4)*(x-3))/3 = 0 // * 3
(x-3/4)*(x-3) = 0
( x-3/4 )
x-3/4 = 0 // + 3/4
x = 3/4
( x-3 )
x-3 = 0 // + 3
x = 3
x in { 3/4, 3 }
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