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If a = ⎡ ⎢ ⎣ 3 9 0 1 8 − 2 7 5 4 ⎤ ⎥ ⎦ and B = ⎡ ⎢ ⎣ 4 0 2 7 1 4 2 2 6 ⎤ ⎥ ⎦ , Then Find the Matrix B ' a ' . - Mathematics

Sum

If A = `[[3,9,0] ,[1,8,-2], [7,5,4]]` and B =`[[4,0,2],[7,1,4],[2,2,6]]` , then find the matrix `B'A'` .

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Solution

B' = `[[4,7,2],[0,1,2],[2,4,6]]` & A' = `[[3,1,7],[9,8,5],[0,-2,4]]`

`therefore` B'A' = `[[4,7,2],[0,1,2],[2,4,6]][[3,1,7],[9,8,5],[0,-2,4]]`

= `[[12+63,  4+56-4, 28+35+8],[9,8-4,5+8],[6+36,2+32-12,14+20+24]]`

= `[[75,56,71],[9,4,13],[42,22,58]]`

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