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Question
Find the value of 'x' for which `|(3, x),(x, 1)| = |(3, 2),(4, 1)|`
Options
`sqrt(2)`
`- sqrt(2)`
`+- 2 sqrt(2)`
`+- 3 sqrt(2)`
MCQ
Solution
`+- 2 sqrt(2)`
Explanation:
We have `|(3, x),(x, 1)| = |(3, 2),(4, 1)|`
i.e., `3 - x^2 = 3 - 8 => x^2 = 8`
Hence `x = +- 2sqrt(2)`
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