$$(x+4)(x+6) = 360$$
Answer
$$ \begin{matrix}x_1 = 14 & x_2 = -24 \\[1 em] \end{matrix} $$
Explanation
$$ \begin{aligned} (x+4)(x+6) &= 360&& \text{simplify left side} \\[1 em]x^2+6x+4x+24 &= 360&& \\[1 em]x^2+10x+24 &= 360&& \text{move all terms to the left hand side } \\[1 em]x^2+10x+24-360 &= 0&& \text{simplify left side} \\[1 em]x^2+10x-336 &= 0&& \\[1 em] \end{aligned} $$
$ x^{2}+10x-336 = 0 $ is a quadratic equation.
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