来自陈晓玲的问题
若实数xy满足,4x^2-y^2-4x+6y+10=0,求x^2+y^2的值
若实数xy满足,4x^2-y^2-4x+6y+10=0,求x^2+y^2的值
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2020-03-1007:18
若实数xy满足,4x^2-y^2-4x+6y+10=0,求x^2+y^2的值
若实数xy满足,4x^2-y^2-4x+6y+10=0,求x^2+y^2的值
是+y^2吧(4x^2-4x+1)+(y^2+6y+9)=0(2x-1)^2+(y+3)^2=0
(2x-1)^2>=0,(y+3)^2>=0,(2x-1)^2=0,(y+3)^2=0x=1/2,y=-3,x^2+y^2=37/4