(2 Sqrt X) + (3(x+1)^2) - (sqrt 4x + X^2), Can You Help?


Answer:
(2√x) + 3(x+1)2 - ((√4x) + x2)
  = (2√x) + 3(x2 +2x +1) - ((2√x) + x2)
  = (2√x) + 3x2 + 6x + 3 - (2√x) - x2
  = (2√x) - (2√x) + 3x2 - x2 + 6x + 3
  = 2x2 + 6x + 3

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