Help me please solve the system x^3-y^3=19 x-y=1
(x-y)(x^2+xy+y^2)=19 x-y=1 x^2+xy+y^2=19 x=1+y (1+y)^2+(1+y)y+y^2=19 1+2y+y^2+y+y^2+y^2-19=0 3y^2+3y-18=0 y^2+y-6=0 D=25 y1,2=(-1+-5)/6=2/3; -1 x1=1+2/3=5/3 x2=1-1=0