\begin{equation}(x-2)(x-8)=0\end{equation}

\begin{equation}10(x-7)x=0\end{equation}

\begin{equation}(4x-8)(x-3)=0\end{equation}

\begin{equation}(10x+10)(10x-10)=0\end{equation}

\begin{equation}(8x-2)(4x-2)=0\end{equation}

\begin{equation}x^{2}+10x+21=0\end{equation}

\begin{equation}x^{2}=(-11)x-28\end{equation}

\begin{equation}x^{2}+16x+64=0\end{equation}

\begin{equation}64x^{2}-25=0\end{equation}

\begin{equation}-(x^{2}+3x-28)=0\end{equation}

\begin{equation}(-10)(x^{2}+3x-28)=0\end{equation}

\begin{equation}4x^{2}+10x+12=0\end{equation}

\begin{equation}-(x^{2}+21x-9)=0\end{equation}

\begin{equation}8x^{2}+18x-8=0\end{equation}

\begin{equation}3(x^{2}-25)=0\end{equation}

\begin{equation}10(4x^{2}+40x+100)=0\end{equation}

\begin{equation}360x^{2}=250\end{equation}

\begin{equation}(-2)(x^{2}-20x+100)=0\end{equation}

\begin{equation}100x^{2}-20x+1=0\end{equation}

\begin{equation}9(9x^{2}+6x+1)=0\end{equation}

\begin{equation}6(64x^{2}-16x+1)=0\end{equation}

\begin{equation}8(x^{2}+16x+64)=0\end{equation}

\begin{equation}36x^{2}=(\frac{1}{5})^{2}\end{equation}