The question is: determine $B^\top B$ with matrix:
$$B=\begin{pmatrix}1&2&-1\\-2&3&-5\end{pmatrix}$$
I don't understand what they are asking.
2026-04-01 13:51:24.1775051484
What means $B^\top B$ in a matrix?
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$B^T=\begin{pmatrix}1&-2\\2&3\\-1&-5\end{pmatrix}$ $B=\begin{pmatrix}1&2&-1\\-2&3&-5\end{pmatrix}$,$B^TB=\begin{pmatrix}1&-2\\2&3\\-1&-5\end{pmatrix}\begin{pmatrix}1&2&-1\\-2&3&-5\end{pmatrix}=$