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प्रश्न
If A = `|(17 , 5 , 19),(11 , 8 , 13)|` and B =`|(9,3,7),(1,6,5)|` , find 2A - 3B
उत्तर
A = `|(17 , 5 , 19),(11 , 8 , 13)|_(2 xx 3)` B = `|(9,3,7),(1,6,5)|_(2 xx 3)`
2A - 3B = `|(34 , 10 , 38) , (22 , 16 , 26)| - |(27,9 , 21),(3 , 18 , 15)|`
`= |(7 , 1 , 17),(19 , - 2 , 11)|_(2 xx 3)`
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