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MHT CET20225 Aug 2022Morning ShiftMathematicsVector AlgebraActual

For any two non-zero vectors a and b ,(a b +b a ) (a b -b a ) is

Options

  1. A2| b | 2
  2. B0
  3. C| a |^2
  4. D| a |^2+| b |^2

Correct answer

B. 0

Step-by-step solution

aligned & (a b +b a ) (a b -b a ) & =a^2( b b )-b^2( a a ) & =a^2 b^2-b^2 a^2 & =0 aligned

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