Find the square root of 4x^2 + 9y^2 + 16 + 12xy + 16x + 24y.

  1. pm(2x - 3y + 4)
  2. pm(2x + 3y + 4)
  3. pm(2x + 3y - 4)
  4. pm(4x + 9y + 16)
Answer

B) pm(2x + 3y + 4)

Expanding (2x + 3y + 4)^2 gives 4x^2 + 9y^2 + 16 + 12xy + 16x + 24y, so its square root is pm(2x + 3y + 4). SLO M-09-A-20 · Understanding

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