Hi,

The idea is... to isolate the radical term on one side of the EQ 

and then square both sides of the EQuation



   4(x+4) = x^2 + 2x + 1

   4x + 4 = x^2 + 2x + 1

    x^2 - 2x -3 = 0

  (x-3)(x+1) = 0

    x = 3  0r  x = -1 

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