x²+2=2x-------(1)*x x³+2x=2x²------(2)*x x^4+2x²=2x³------(3) add all x^4+2x²+x³+2x+x²+2=2x+2x²+2x³ x^4-x³+x²+2=0, 787 viewsGarïmä, 00:50