WBCS.LIVE practice question

If x2 + y2 - 4x + 8y + 20 = 0 then find the value of x2 + y2.

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

Answer options

  1. 30
  2. 20
  3. 10
  4. 40

Correct answer and explanation

Correct answer: 20