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Question
If A = `[(-2, 1),(0, 3)]` Then 2A2 – 3A ______.
Options
`[(14, -1),(0, 9)]`
`[(-14, 1),(0, 9)]`
`[(14, 1),(0, -9)]`
`[(14, -1),(0, -9)]`
MCQ
Fill in the Blanks
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Solution
If A = `[(-2, 1),(0, 3)]` Then 2A2 – 3A `underlinebb([(14, -1),(0, 9)]`.
Explanation:
`2[(-2, 1),(0, 3)][(-2, 1),(0, 3)] -3[(-2, 1),(0, 3)]`
`2[(4, 1),(0, 9)] - [(-6, 3),(0, 9)] = [(8, 2),(0, 18)] - [(-6, 3),(0, 9)]`
= `[(14, -1),(0, 9)]`
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Adjoint of a Matrix
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