$$2x^2-4x = 10$$
Answer
$$ \begin{matrix}x_1 = 1-\sqrt{ 6 } & x_2 = 1+\sqrt{ 6 } \\[1 em] \end{matrix} $$
Explanation
$$ \begin{aligned} 2x^2-4x &= 10&& \text{move all terms to the left hand side } \\[1 em]2x^2-4x-10 &= 0&& \\[1 em] \end{aligned} $$
$ 2x^{2}-4x-10 = 0 $ is a quadratic equation.
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