x^2+y^2+17除以4=4x+y,x+y+?
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x^2+y^2+17除以4=4x+y,x+y+?
x^2+y^2+17除以4=4x+y,x+y+?
x^2+y^2+17除以4=4x+y,x+y+?
x^2+y^2+17除以4=4x+y
(x-2)^2+(y-1/2)^2=0
上式只有分别等于0时,才成立
则x=2 y=1/2
x+y=2+1/2=5/2