Factorization
Factorize the following
\begin{align*}
1)\,\,&ax+ay =a(x+y)\\\\
2)\,\,&a^2x+ay =a(ax+y)\\\\
3)\,\,&a^3x+a^2y =a^2(ax+y)\\\\
4)\,\,&2x+2y =2(x+y)\\\\
5)\,\,&4x+2y =2(2x+y)\\\\
6)\,\,&8x+4y =4(2x+y)\\\\
7)\,\,&x^2+xy =x(x+y)\\\\
8)\,\,&2x^2+xy =x(2x+y)\\\\
\end{align*}