Question 253294
The given equation is
                x^(2/3)-15x^(1/3)+26=0  ...(1)
                    Put x^(1/3) = y
Then, (1) becomes  y^2-15y+26 = 0
                   (y-2)(y-13) = 0
                             y = 2  or  y = 13
                       x^(1/3) = 2  or x^(1/3) = 13 
                             x = 2^3 or x = 13^3
                             x = 8   or x = 2197