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NDA2015MathematicsTrigonometric Ratios & IdentitiesActual

Let be the root of the equation 25 ^2 +5 -12=0 , where 2 . What is 2 equal to?

Options

  1. A24 25
  2. B-24 25
  3. C-5 12
  4. D-21 25

Correct answer

B. -24 25

Step-by-step solution

aligned & 2 =2 & =2 ( 3 5 ) ( -4 5 ) & = 6 5 -4 5 = -24 25 aligned Option (B) is correct.

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