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If ( + )=2 and ( - )=1 , then (2 ) is equal to

Options

  1. A-3
  2. B-2
  3. C-1/3
  4. D1

Correct answer

A. -3

Step-by-step solution

aligned & ( + )=2 & ( - )=1 & 2 = [( + )+( - )] & = ( + )+ ( - ) 1- ( + ) ( - ) & = 2+1 1-2.1 = 3 -1 =-3 aligned

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