\[(x + 2)\left( x + \frac{1}{2} \right) = 0\]
\[x^{2} + 2x + \frac{1}{2}x + 1 = 0\ \ \]
\[x^{2} + 2,5x + 1 = 0\ \ | \cdot 2\]
\[2x^{2} + 5x + 2 = 0\]
\[Ответ:2x^{2} + 5x + 2 = 0.\]