(8zx-27y^2)^2+(3y^2-yz+2z^2-8x)^2+9=6x-x^2
1个回答
题目打错了,应该是
(8zx-27y^2+9yz)^2+(3y^2-yz+2z^2-8x)^2+9=6x-x^2
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