This image shows some kind of formula that could be converted to TeX. Storing formulas as images makes it harder to change them. TeX also helps making sure that they all use the same font and size.
A replacement has been proposed:

${\displaystyle {\begin{bmatrix}2&4&7&3\\3&4&0&1\\0&5&2&-1\end{bmatrix}}}$

In your article, replace the image with:

<math>\begin{bmatrix}
2&4&7&3\\
3&4&0&1\\
0&5&2&-1
\end{bmatrix}</math>

This image was uploaded as GIF, while a different format would have been more suitable. Commons discourages the use of GIF files, except for animations. See Commons:File types for more information.
If possible, please upload a PNG version (or JPEG for some photos) of this image, and mark the GIF image as {{Superseded|‹new image name›}}. If you like, encourage other Wikimedia projects using the GIF to use the new version instead.
If this image is a diagram or other image suitable for vectorisation, please tag this image with {{Convert to SVG}} instead of {{BadGIF}}. If not suitable for vectorisation, use {{Convert to PNG}}. For more information, see {{BadGIF}}.