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
答
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