Wp/bol/0

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$\begin{array}{cc}0\times 1& =0\\ 0\times 2& =0.\end{array}$

$0\times 1=0\times 2.$

$\frac{0}{0}\times 1=\frac{0}{0}\times 2.$

$1=2.$

$\begin{array}{cc}(x-x)x& =x^2-x^2=0\\ (x-x)(x+x)& =x^2-x^2=0\end{array}$