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svetoff [14.1K]
3 years ago
7

HELP PLEASE WILL MARK BRAINLIEST TO BEST ANSWER

Mathematics
2 answers:
Oksanka [162]3 years ago
5 0

Answer:

(3x) {}^{2}

Step-by-step explanation:

hope it helps..

nlexa [21]3 years ago
3 0

Answer:

c

Step-by-step explanation:

(3x)ex2

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True or false: (a) If A2 is defined then A is necessarily square. (b) If AB and BA are defined then A and Bare square. (c) If AB
andrew-mc [135]

(a) True. Suppose A is a not a square matrix, with m rows and n columns. Then A² is not defined, because you can't multiply an m×n matrix by another m×n matrix.

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B_{2\times3} = \begin{bmatrix}-1&0&1\\0&0&1\end{bmatrix}

Then both AB and BA are defined, with

AB_{3\times3} = \begin{bmatrix}-1&0&1\\0&0&1\\0&0&0\end{bmatrix}

BA_{2\times2} = \begin{bmatrix}-1&0\\0&0\end{bmatrix}

In general, you can multiply any m×n by any n×m matrix.

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