WBCS.LIVE practice question

If x = b + c, y = c - a, z = a - b, then find the value of x2 + y2 + z2 - 2xy - 2xz + 2yz.

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

Answer options

  1. 4b2
  2. 4a2
  3. 4c2
  4. 2b

Correct answer and explanation

Correct answer: 4b2