Matrix Question?

Quote:

Originally Posted by gdilm

i need help
if
$<br /> <br /> A=\begin{pmatrix}1&0&2\\0&1&0\\2&0&1\end{pmatrix}.<br />$
calculate B3-3B2-B+3I

the B3 and the 3B2 the 3 and the 2 are above but i dont know how to type them here

please help how im gonna calculate B if i only know A?
pls answer me someone

First, do not add questions to someone else's thread. Start your own thread.

Second, you can't "find B" if only know A! Go back and read the problem again. Make sure you haven't left something out.