一元二次方程中什么时候用配方法、因式分解法、公式法、直接开平方,有没有什么方法看出用哪一种方法? 知乎 Template




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tomski一元二次方程中什么时候用配方法、因式分解法、公式法、直接开平方,有没有什么方法看出用哪一种方法? 知乎 coloring