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Question
If P = `[(4, 6),(2 ,- 8)], "Q" = [(2, -3),(-1, 1)]` Find 2PQ
Solution
P = `[(4, 6),(2 ,- 8)]`
Q = `[(2, -3),(-1, 1)]`
2PQ = `2[(4, 6),(2 , -8)] xx [(2, -3),(-1, 1)]`
= `2[(8 - 6, -12 + 6),(4 + 8, -6 - 8)]`
= `2[(8, -6),(12, -14)]`
= `[(4, -12),(24, - 28)]`.
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