Algebra Archive: Questions from November 15, 2022
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2 answers
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2 answers
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if possible, find AB, BA, A^2. (if not possible, enter impossible into any cell)
\[ A=\left[\begin{array}{rrr} 6 & -7 & 0 \\ 1 & 0 & -9 \\ -1 & 2 & 11 \end{array}\right], \quad B=\left[\begin{array}{lll} 1 & 0 & 0 \\ 0 & 1 & 0 \\ 0 & 0 & 1 \end{array}\right] \] a) \( A B \) (b) \(2 answers -
if possible, find A+B,A-B,5A, and 5A-4B. (if not possible, type impossible)
(a) \( A+B \) (b) \( A-B \) (c) \( 5 \mathrm{~A} \) (d) \( 5 A-4 B \) \( A=\left[\begin{array}{rr}7 & -5 \\ 4 & 3 \\ -1 & 4\end{array}\right], \quad B=\left[\begin{array}{rr}2 & 9 \\ -4 & -3 \\ 2 & 12 answers