问题
解答题
已知:x2+5y2-4xy-6y+9=0,求x、y的值.
答案
x2+5y2-4xy-6y+9=0,
x2+4y2-4xy+y2-6y+9=0,
(x-2y)2+(y-3)2=0,
x-2y=0,y-3=0,
解得y=3,x=6.
已知:x2+5y2-4xy-6y+9=0,求x、y的值.
x2+5y2-4xy-6y+9=0,
x2+4y2-4xy+y2-6y+9=0,
(x-2y)2+(y-3)2=0,
x-2y=0,y-3=0,
解得y=3,x=6.