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The value for x, if  is?

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  1. 5, -5
  2. 6, -6
  3. -5, -5
  4. -6, -6

Answer (Detailed Solution Below)

Option 1 : 5, -5
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Detailed Solution

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Concept:

Determinant of a matrix can be calculated as

Calculation:

Given-

∴ x (2x) – (3)(5) = (5)(3) – (–4)(5)

2 x2 – 15 = 15 + 20

x2 = 25

x = ± 5

x = 5, - 5 

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