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4.一元二次方程求根公式的应用 在上一节,我们导出了一元二次方程的求根公式,这个公式的全部内容就是下面方框内的这几句话:
4. The application of the quadratic equation for solving the quadratic equation In the previous section, we derived the root finding formula for the univariate quadratic equation. The entire contents of this formula are the following sentences in the following box: