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# Matrices Watch

1. If the matrix M = RE (matrix transformation E followed by transformation R), then does det(M) = det(R)det(E)?
Would this always be true is why? Thank you!

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2. (Original post by maths_4_life)
If the matrix M = RE (matrix transformation E followed by transformation R), then does det(M) = det(R)det(E)?
Would this always be true is why? Thank you!

Posted from TSR Mobile
Yes, this equality holds, and yes this is a general property of (square) matrices. The proof is a little complicated, I can find a link if necessary.
3. (Original post by joostan)
Yes, this equality holds, and yes this is a general property of (square) matrices. The proof is a little complicated, I can find a link if necessary.
It's ok I can just remember that! Thank you very much!!!

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Updated: April 30, 2016
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