Question

Find the value of 'x' for which `|(3, x),(x, 1)| = |(3, 2),(4, 1)|`

विकल्प

• `sqrt(2)`

• `- sqrt(2)`

• `+- 2 sqrt(2)`

• `+- 3 sqrt(2)`

Answer 1

`+- 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)`