Can someone check is this alright, chatgpt is using wrong formula i guess

[marsh yacht]

What is this supposed to be?

Okay, let me get this straight, you're looking for the determinant of this matrix?

$\newline\begin{bmatrix}
2 & 9 & 3 \
-4 & 8 & 2 \
-3 & 2 & 7
\end{bmatrix}$

[crude condor]

solarunes

[marsh yacht]

Well in that case ChatGPT is right.

[round prairie]

First element should be 2(56-4) not +4

This is the formula if you want it

That is correct

[vale pivot]

at the end?

[round prairie]

He did not subtract at the end he just added the terms which where -ve

I can’t explain that well

[marsh yacht]

That's because the determinant of the last 2x2 matrix is negative (-87).