作业帮已知x、y满足：x^2+y^2+6x-10y+34=0,求y-x的值
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已知x、y满足：x^2+y^2+6x-10y+34=0,求y-x的值
已知x、y满足：x^2+y^2+6x-10y+34=0,求y-x的值
已知x、y满足：x^2+y^2+6x-10y+34=0,求y-x的值
x^2+y^2+6x-10y+34=0,
x^2+6x+9+y^2-10y+25=0
(x+3)^2+(y-5)^2=0
x+3=0,y-5=0
x=-3,y=5
则y-x=5-(-3)=5+3=8
得8，保证正确
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