(3-x)^3+17=-10+x^2(9-x) 3^3-3*3^2x+3*3x^2-x^3+17=-10+9x^2-x^3 27-27x+9x^2-x^3+17+10-9x^2+x^3=0 54-27x=0 54=27x x=2