已知5x²-2xy+y²+4x+1=0,求x,y的值
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已知5x²-2xy+y²+4x+1=0,求x,y的值
5x²-2xy+y²+4x+1=0
x²-2xy+y²+4x²+4x+1=0
(x-y)²+(2x+1)²=0
2x+1=0
x-y=0
x=-1/2
y=-1/2
已知5x²-2xy+y²+4x+1=0,求x,y的值
5x²-2xy+y²+4x+1=0
x²-2xy+y²+4x²+4x+1=0
(x-y)²+(2x+1)²=0
2x+1=0
x-y=0
x=-1/2
y=-1/2