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z in (-oo:+oo)
((3*z-4)^2)/3 = ((16*z)^1)/3 // - ((16*z)^1)/3
((3*z-4)^2)/3-(((16*z)^1)/3) = 0
((3*z-4)^2)/3+(-16/3)*z = 0
((3*z-4)^2)/3+(-16*z)/3 = 0
(3*z-4)^2-16*z = 0
9*z^2-40*z+16 = 0
9*z^2-40*z+16 = 0
9*z^2-40*z+16 = 0
DELTA = (-40)^2-(4*9*16)
DELTA = 1024
DELTA > 0
z = (1024^(1/2)+40)/(2*9) or z = (40-1024^(1/2))/(2*9)
z = 4 or z = 4/9
(z-4/9)*(z-4) = 0
((z-4/9)*(z-4))/3 = 0
((z-4/9)*(z-4))/3 = 0 // * 3
(z-4/9)*(z-4) = 0
( z-4/9 )
z-4/9 = 0 // + 4/9
z = 4/9
( z-4 )
z-4 = 0 // + 4
z = 4
z in { 4/9, 4 }
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