></mtr><mtr><mtd><mrow><msub><mi>y</mi><mn>1</mn></msub></mrow></mtd></mtr></mtable><mo fence="true">)</mo></mrow></mrow><annotation encoding="application/x-tex">\begin{pmatrix}x_2 \\ y_2 \end{pmatrix} = 
\begin{pmatrix} A &amp; B \\ C &amp; D \end{pmatrix}\cdot
\begin{pmatrix} x_1 \\ y_1 \end{pmatrix}</annotation></semantics></math></span><span class="katex-html" aria-hidden="true"><span class="strut" style="height:1.45em;"></span><span class="strut bottom" style="height:2.40003em;vertical-align:-0.95003em