3^2-2*3+u = (3^3-3*8) (2) + u

3^2-2*3+u = (3^3-3*8) (2) + u

3^2-2*3+u = (36-24) (2) + u

3^2-2*3+u=12 (2) + u

9-2*3+u=24+u

9-6+u=24+u

3+u=24+u

3+u - 3 = 24+u - 3 (subtract 3 from both sides)

u - u = 24+u - u (subtract u from both sides)

0 = 24

this is an untrue statement, so this equation has no solution