第3冊單元4-2配方法與一元二次方程式的公式解第2次測驗
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下列那一個一元二次方程式的兩根是相等的？
5x^2-10x+1=0
\frac{2}{3}x^2-\frac{1}{3}x+\frac{1}{16}=0
\frac{1}{8}x^2-2x+8=0
x^2+2x-1=0
下列那一個一元二次方程式的兩根是相等的？
下列那一個一元二次方程式有相異兩根？
