$$ \mathbf{\Delta \dot{C}} = \begin{bmatrix} \htmlClass{r1c1}{K_{00}} & \htmlClass{r1c2}{K_{01}}\\ \htmlClass{r2c1}{K_{10}} & \htmlClass{r2c2}{K_{11}} \end{bmatrix} \begin{bmatrix} \htmlClass{col1}{J_x}\\ \htmlClass{col2}{J_y} \end{bmatrix} = \begin{bmatrix} \htmlClass{res1}{J_x K_{00} + J_y K_{01}}\\ \htmlClass{res2}{J_x K_{10} + J_y K_{11}} \end{bmatrix} $$