解:因为x²+y²+4x-6y+13=0所以(x²+4x+4)+(y²-6y+9)=0(x+2)²+(y-3)²=0x+2=0且y-3=0x=-2, y=3所以x的y次方=(-2)³= -8
解:因为x²+y²+4x-6y+13=0对其进行转换得:(x²+4x+4)+(y²-6y+9)=0(x+2)²+(y-3)²=0由于平方项为非负数所以有:x+2=0且y-3=0解得:x=-2, y=3x的y次方=(-2)³= -8