Math Question
![Subtract the matrices. What number fills in [?]?
\[
\begin{array}{c}
{\left[\begin{array}{rrr}
2 & 9 & -4 \\
-3 & 5 & 1
\end{array}\right]\left[\begin{array}{rrr}
4 & -6 & -1 \\
5 & -9 & 4
\end{array}\right]} \\
A-B=\left[\begin{array}{rrr}
-2 & 15 & -3 \\
-8 & 14 & {[?]}
\end{array}\right]
\end{array}
\]](https://d3hlidq5bf9vg0.cloudfront.net/stunitas/0284/XNDMWYfgVDjZzYVVo57z5dpYjpLrsjxaPFkw6hUsTtkBVOApXyUOL6smnsveTt5u_q.jpg "Subtract the matrices. What number fills in [?]?
\[
\begin{array}{c}
{\left[\begin{array}{rrr}
2 & 9 & -4 \\
-3 & 5 & 1
\end{array}\right]\left[\begin{array}{rrr}
4 & -6 & -1 \\
5 & -9 & 4
\end{array}\right]} \\
A-B=\left[\begin{array}{rrr}
-2 & 15 & -3 \\
-8 & 14 & {[?]}
\end{array}\right]
\end{array}
\]")
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