$$x^2-2x = 48$$
Answer
$$ \begin{matrix}x_1 = -6 & x_2 = 8 \\[1 em] \end{matrix} $$
Explanation
$$ \begin{aligned} x^2-2x &= 48&& \text{move all terms to the left hand side } \\[1 em]x^2-2x-48 &= 0&& \\[1 em] \end{aligned} $$
$ x^{2}-2x-48 = 0 $ is a quadratic equation.
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