WBCS.LIVE practice question

If a = x + y, b = x - y and c = 2x - 1 then find the value a2 + b2 + c2 - 2ab + 2ac - 2bc?

Solve this multiple-choice question and check the correct answer with its explanation below.

Answer options

  1. 0
  2. (2x + 2y - 1)2
  3. (2x - 2y - 1)2
  4. (x - y -1)2

Correct answer and explanation

Correct answer: (2x + 2y - 1)2