若x*x+y*y-8x+6y+25=0,求y的x次方

问题描述:

若x*x+y*y-8x+6y+25=0,求y的x次方

x*x+y*y-8x+6y+25=0分解为(x-4)^2+(y+3)^2=0
解得:x=4,y=-3
y^x=81