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Question
Evaluate the following :
`|(6 , 1),(3 , 1),(2 , 4)| |(1 , -2 , 1),(2 , 1 , 3)|`
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Solution
`|(6 , 1),(3 , 1),(2 , 4)|_(3 xx 2) |(1 , -2 , 1),(2 , 1 , 3)|_(2 xx 3)`
`= |(6+2 , -12+1 , 6 + 3),(3 +2 , -6+1 , 3 + 3),(2 + 8 , -4 + 4 , 2 + 12)|`
`= |(8 , -11 , 9),(5 , -5 , 6),(10 , 0 , 14)|_(3 xx 3)`
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