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Question
Given A = `[(4, 7),(3, -2)]` and B = `[(1, 2),(-1, 4)]`, then A – 2B is ______.
Options
`[(-2, 3),(5, -10)]`
`[(-2, -3),(-5, 10)]`
`[(2, 3),(5, -10)]`
`[(2, 3),(5, 10)]`
MCQ
Fill in the Blanks
Solution
Given A = `[(4, 7),(3, -2)]` and B = `[(1, 2),(-1, 4)]`, then A – 2B is `underlinebb([(2, 3),(5, -10)])`.
Explanation:
Given
A – 2B = `[(4, 7),(3, -2)] - 2[(1, 2),(-1, 4)]`
= `[(4, 7),(+3, -2)] - [(2, 4),(-2, 8)]`
= `[(4 - 2, 7 - 4),(3 + 2, -2 - 8)]`
= `[(2, 3),(5, -10)]`
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