$\left\{\begin{matrix}a=-\frac{4x_{2}+b_{2}-a_{2}}{bx}\text{, }&x\neq 0\text{ and }b\neq 0\\a\in \mathrm{C}\text{, }&x_{2}=\frac{a_{2}-b_{2}}{4}\text{ and }\left(x=0\text{ or }b=0\right)\end{matrix}\right.$

$\left\{\begin{matrix}a=-\frac{4x_{2}+b_{2}-a_{2}}{bx}\text{, }&x\neq 0\text{ and }b\neq 0\\a\in \mathrm{R}\text{, }&x_{2}=\frac{a_{2}-b_{2}}{4}\text{ and }\left(x=0\text{ or }b=0\right)\end{matrix}\right.$

$a_{2}=abx+4x_{2}+b_{2}$