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Incorrect. Check the answer or another user, cheajimmy.
  ( x+1)(x-1)
   this expression is called difference of two squares
   it's very important, and should be remembered by heart
     the pattern is         (a+b)(a-b)  =  a² - b²
               (x + 1)(x-1)  =   x² - 1²   =  x² -1
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