\begin{equation}(x-4)(x-7)=0\end{equation}

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

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

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

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

\begin{equation}x^{2}+12x+27=0\end{equation}

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

\begin{equation}x^{2}+10x+25=0\end{equation}

\begin{equation}81x^{2}-16=0\end{equation}

\begin{equation}-(x^{2}+4x-32)=0\end{equation}

\begin{equation}(-3)(x^{2}+4x-21)=0\end{equation}

\begin{equation}5x^{2}+29x+45=0\end{equation}

\begin{equation}-(2x^{2}-3x-6)=0\end{equation}

\begin{equation}8(10x^{2}+34x-48)=0\end{equation}

\begin{equation}7(x^{2}-49)=0\end{equation}

\begin{equation}x^{2}+10x+25=0\end{equation}

\begin{equation}300x^{2}=75\end{equation}

\begin{equation}(-10)(x^{2}-14x+49)=0\end{equation}

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

\begin{equation}8(9x^{2}+6x+1)=0\end{equation}

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

\begin{equation}3(x^{2}+6x+9)=0\end{equation}

\begin{equation}25x^{2}=(\frac{1}{1})^{2}\end{equation}