Question
$$36 = x^2$$
Answer
$$ \begin{matrix}x_1 = 6 & x_2 = -6 \\[1 em] \end{matrix} $$
Explanation
$$ \begin{aligned} 36 &= x^2&& \text{move all terms to the left hand side } \\[1 em]36-x^2 &= 0&& \text{simplify left side} \\[1 em]-x^2+36 &= 0&& \\[1 em] \end{aligned} $$
$ -x^{2}+36 = 0 $ is a quadratic equation.
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