WBCS.LIVE practice question

Simplify: (4x - 5y)2 + (5x + 4y)2 + (4x + 5y) (4x - 5y)

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

Answer options

  1. 57x2 + 16y2
  2. -57x2 - 16y2
  3. -58x2 + 16y2
  4. 58x2 + 16y2

Correct answer and explanation

Correct answer: 57x2 + 16y2