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If A= [ array ll a & b b & a array ] and A₂= [ array ll & & array ] , then

Options

  1. A=2 a b, =a^2+b^2
  2. B= a ₂+ b ₂, = ab
  3. C=a^2+b^2, =2 a b
  4. D=a^2+b^2, =a^2-b^2

Correct answer

C. =a^2+b^2, =2 a b

Step-by-step solution

A^2= [ array ll & & array ]= [ array ll a & b b & a array ] [ array ll a & b b & a array ] =a^2+b^2 ; =2 a b

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