1952 AMC 12 第 6 题
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所有题目均经美国数学协会（MAA）官方合法授权使用。
6.
方程 两根之差为：
The difference of the roots of is:
答案：E
小提示：
用求根公式写出两个根
Write the two roots using the quadratic formula
大提示：
因为首项系数为 ，所以两根之差是判别式的平方根
Their separation is the square root of the discriminant because the leading coefficient is
解答：
两根为 和 。因此，它们的正差为 。
因此，正确答案是 E。
The roots are and Their positive difference is therefore
Thus, the correct answer is E.
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