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

\begin{equation}5(x-5)x=0\end{equation}

\begin{equation}(8x-1)(x-1)=0\end{equation}

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

\begin{equation}(5x-7)(5x-9)=0\end{equation}

\begin{equation}x^{2}+11x+18=0\end{equation}

\begin{equation}x^{2}=(-11)x-18\end{equation}

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

\begin{equation}9x^{2}-9=0\end{equation}

\begin{equation}-(x^{2}+5x-24)=0\end{equation}

\begin{equation}(-1)(x^{2}+4x-21)=0\end{equation}

\begin{equation}x^{2}+72x+14=0\end{equation}

\begin{equation}-(9x^{2}+10x-8)=0\end{equation}

\begin{equation}4(3x^{2}-1x-10)=0\end{equation}

\begin{equation}9(x^{2}-81)=0\end{equation}

\begin{equation}10(81x^{2}+18x+1)=0\end{equation}

\begin{equation}24x^{2}=486\end{equation}

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

\begin{equation}4x^{2}-4x+1=0\end{equation}

\begin{equation}11(25x^{2}+10x+1)=0\end{equation}

\begin{equation}6(81x^{2}-18x+1)=0\end{equation}

\begin{equation}4(x^{2}+8x+16)=0\end{equation}

\begin{equation}4x^{2}=(\frac{6}{3})^{2}\end{equation}