Mathematics, 01.05.2021 05:10 iamsecond235p318rq

If A=(-3 -9 -3) (-4 -3 9) (7 9 -10) and B= (9 1 6) (3 -10 5) (-1 9 -9), find -7A-4B.

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If A=(-3 -9 -3) (-4 -3 9) (7 9 -10) and B= (9 1 6) (3 -10 5) (-1 9 -9), find -7A-4B.
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