问题
计算题
解方程：2x2－6x＋1＝0．
答案
解：因为a＝2，b＝－6，c＝1，
所以b2－4ac＝(－6)2－4×2×1＝28．
代入公式，得
所以原方程的根为
略
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解方程：2x2－6x＋1＝0．
解：因为a＝2，b＝－6，c＝1，
所以b2－4ac＝(－6)2－4×2×1＝28．
代入公式，得
所以原方程的根为
略
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