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文[1]叙述了形如“已知Ax~2+Bxy+Cy~2 =D,求Ex~2+Fxy+Gy~2的最值”的问题的统一解法,方法很好,但操作技巧过强,不利于理
The paper [1] describes a unified solution to the problem of the form “known Ax~2+Bxy+Cy~2=D, find the best value of Ex~2+Fxy+Gy~2”. The method is very good, but the operation skills Too strong and unfavorable