Question
$$(50+2x)\cdot(34+2x) = 0$$
Answer
$$ \begin{matrix}x_1 = -17 & x_2 = -25 \\[1 em] \end{matrix} $$
Explanation
$$ \begin{aligned} (50+2x)\cdot(34+2x) &= 0&& \text{simplify left side} \\[1 em]1700+100x+68x+4x^2 &= 0&& \\[1 em]4x^2+168x+1700 &= 0&& \\[1 em] \end{aligned} $$
$ 4x^{2}+168x+1700 = 0 $ is a quadratic equation.
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