原式配方得:x²+xy+y²/4 + 3y²/4-3y+3=0即得:(x+ y/2)²+ 3(y/2 -1)²=0则有:x+ y/2=0且y/2 -1=0解得:y/2=1即y=2,x=-y/2=-1所以:x的y次幂=(-1)²=1