Question
$$(2x+13)(3x+9) = 0$$
Answer
$$ \begin{matrix}x_1 = -3 & x_2 = -\dfrac{ 13 }{ 2 } \\[1 em] \end{matrix} $$
Explanation
$$ \begin{aligned} (2x+13)(3x+9) &= 0&& \text{simplify left side} \\[1 em]6x^2+18x+39x+117 &= 0&& \\[1 em]6x^2+57x+117 &= 0&& \\[1 em] \end{aligned} $$
$ 6x^{2}+57x+117 = 0 $ is a quadratic equation.
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