若实数xy满足根号下x+1+(y-5)²则xy的次方值为?
问题描述：
若实数xy满足根号下x+1+(y-5)²则xy的次方值为?
答
根号下x+1+(y-5)²=0
x+1=0,y-5=0
x=-1,y=5
所以
x的y次方
=（-1）的5次方
=-1