Question: Find the constants a and b such that the function is continuous on the entire real line

\[g\left( x \right)=\left\{ \begin{aligned} & \frac{{{x}^{2}}-{{a}^{2}}}{x-a},\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,x\ne a \\ & 8\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,x=a \\ \end{aligned} \right.\]