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3*((13-2*x)/3)^2+2*x^2-35 = 0
(3*(13-2*x)^2)/(3^2)+2*x^2-35 = 0
(3*(13-2*x)^2)/(3^2)+(2*3^2*x^2)/(3^2)+(-35*3^2)/(3^2) = 0
3*(13-2*x)^2+2*3^2*x^2-35*3^2 = 0
30*x^2-156*x-315+507 = 0
30*x^2-156*x+192 = 0
30*x^2-156*x+192 = 0
6*(5*x^2-26*x+32) = 0
5*x^2-26*x+32 = 0
DELTA = (-26)^2-(4*5*32)
DELTA = 36
DELTA > 0
x = (36^(1/2)+26)/(2*5) or x = (26-36^(1/2))/(2*5)
x = 16/5 or x = 2
6*(x-2)*(x-16/5) = 0
(6*(x-2)*(x-16/5))/(3^2) = 0
(6*(x-2)*(x-16/5))/(3^2) = 0 // * 9
6*(x-2)*(x-16/5) = 0
( x-16/5 )
x-16/5 = 0 // + 16/5
x = 16/5
( x-2 )
x-2 = 0 // + 2
x = 2
x in { 16/5, 2 }
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