Bluebook试题7 · 第 20 题

Bluebook试题7 · 原库模块 1 · Q20 原库参考解析

\( 2x^2-8x-7=0 \)
One solution to the given equation can be written as \( \frac{8-\sqrt{k}}{4} \), where k is a constant. What is the value of k?

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