Help with row reduction to find the [x]D

[kind beacon]

I can't seem to derive the same solution [-4 -7 3]^T according to my teachers solution, could someone please help me out?

somebody?? 🥲

[tranquil reef]

Better to post this in #1020426321261756536 .
What are you trying to do here?

[kind beacon]

Im trying to row reduce the matrix to see if i get the same answer as my professor, ie. (-4,-7,3)

@tranquil reef

[tranquil reef]

Oh, you mean you want to perform matrix multiplication using row reduction?

[kind beacon]

hmm not really

We're augmenting the single column next to this transformation matrix to then row reduce it and find the column in the reflected basis if u kno what i mean