This method of construction(realized through the method of completing square) is far conciser than my classification method and I feel pleasantly surprised at the beauty of concision from the standard solution.
This method of construction(realized through the method of completing square) is far conciser than my classification method and I feel pleasantly surprised at the beauty of concision from the standard solution.
这个构造法（通过配方法实现），比我采用的分类处理法不知要简洁多少倍，标准解答所散发的简洁美令我感到惊喜。