x²-6x+y²+8y+25=0 则x= y=
问题描述:
x²-6x+y²+8y+25=0 则x= y=
答
x²-6x+y²+8y+25=0
x²-6x+9+y²+8y+16=0
(x-3)²+(y+4)²=0
(x-3)²=0,(y+4)²=0
x-3=0,y+4=0
x=3,y=-4