x^2+y^2+2x 8x+17=0,x^2009+xy已知x^2+y^2+2x 8x+17=0,求x^2009+xyx^2+y^2+2x-8x+17=0,x^2009+xy

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x^2+y^2+2x8x+17=0,x^2009+xy已知x^2+y^2+2x8x+17=0,求x^2009+xyx^2+y^2+2x-8x+17=0,x^2009+xyx^2+y^2+2x8x+17

x^2+y^2+2x 8x+17=0,x^2009+xy已知x^2+y^2+2x 8x+17=0,求x^2009+xyx^2+y^2+2x-8x+17=0,x^2009+xy
x^2+y^2+2x 8x+17=0,x^2009+xy
已知x^2+y^2+2x 8x+17=0,求x^2009+xy
x^2+y^2+2x-8x+17=0,x^2009+xy

x^2+y^2+2x 8x+17=0,x^2009+xy已知x^2+y^2+2x 8x+17=0,求x^2009+xyx^2+y^2+2x-8x+17=0,x^2009+xy
(x^2+2x+1)+(y^2-8y+16)=0
(x+1)^2+(y-4)^2=0
因为(x+1)^2大于等于0;(y-4)^2大于等于0,
所以(x+1)^2=0 ;(y-4)^2=0
即x+1=0;y-4=0 所以x=-1;y=4
所以x^2009+xy=(-1)^2009+(-1)*4=-1+ -4=-5
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这个题目貌似有点问题吧？“2x 8x”是什么？

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