根号X +2倍根号Y＝根号50=5*根号2 1, 根号X =根号2,2倍根号Y=4*根号2 x=2,y=8 2, 根号X =3*根号2,2倍根号Y=2*根号2 x=18,y=2 3,根号X =5*根号2,2倍根号Y=0 x=50,y=0
