Matrices & Systems · Medium problem

Let $A = \begin{pmatrix}2 & -2 & -3 \\ 4 & -3 & 3\end{pmatrix}$ and $B = \begin{pmatrix}3 & -1 \\ 4 & 3 \\ 3 & -3\end{pmatrix}$. Find the entry in row $1$, column $1$ of $AB$.