A new method of completing the square with reverse order is presented by change quadric form into standard form.

提出了一种新的将二次型化为标准型的配方法——逆序配方法。

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The extremal formula of binary quadratic functions is studied by using method of undetermined coefficients, substitution method and method of completing the square.

用特定系数法、换元法、配方法探求二元二次函数的极值公式。

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When the Ambani residence is finished in January, completing a four-year process, it will be 550 feet high with 400, 000 square feet of interior space.

历时4年，安巴尼的豪宅将在一月完工，届时大厦将高达550英尺(约173米)，内部使用面积可达400,000平方英尺。

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