$$2m^2-m-1 = 0$$
Answer
$$ \begin{matrix}m_1 = 1 & m_2 = -\dfrac{ 1 }{ 2 } \\[1 em] \end{matrix} $$
Explanation
$ 2x^{2}-x-1 = 0 $ is a quadratic equation.
You can use step-by-step quadratic equation solver to see a detailed explanation on how to solve this equation.
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