WBCS.LIVE practice question

If a = 0.1 + 0.9  and b = 0.1 - 0.9  then find value of a2 + b2.

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

Answer options

  1. 2.82
  2. 1.82
  3. 1.9
  4. 2

Correct answer and explanation

Correct answer: 1.82