x²+4y²-2x+8y+5=0
(x-1)²+(2y+2)²=0
得 x=1,y=-1
则 x²-y²/2x²+xy-y²*2y-y/xy-y/(x²+y²/y)²
=1-1/2-1+2-1+1/4
=1/2+1/4
=3/4
已知x^2+4y^2-2x-2x+8y+5=0,求x^2-y^2/2x^2+xy-y^2*2y-y/xy-y/(x^2+
2个回答
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