㈠ 阃夊彇A鍨嫔浘鐗囦笁鍧,B鍨嫔浘鐗1鍧,C鍨嫔浘鐗囱嫢骞插潡,𨰾间竴涓姝ｆ柟褰
a锛2,b锛3
3a²+kab+b²锛濓箼3a+b锕氾箼a+b锕k锛4
濡傚浘锛3a²+4ab+b²A3鍧椼侭涓鍧楋纴C4鍧椼傛嫾鎴愮烦褰5脳9
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