November 7th, 2009, 08:44 AM  #1 
Newbie Joined: Nov 2009 Posts: 6 Thanks: 0  Factorization
This is my first post .. i assume this is the correct place for my question Is there any general way to factorize polynomials of the form x^n1 ?? ex: Code: x^121 = (x1)(x+1)(x^2+1)(x^2x+1)(x^2+x+1)(x^4x^2+1) Can any one help me out with the logic part ? Thank you 
November 7th, 2009, 10:23 AM  #2 
Senior Member Joined: Mar 2007 Posts: 428 Thanks: 0  Re: Factorization
Start with something smaller and work you way up. x^2  1 = (x  1)(x + 1) x^3  1 = (x  1)(x^2 + x + 1) x^4  1 = (x  1)(x^3 + x^2 + x + 1) = (x  1)(x + 1)(x^2 + 1) Keep going and see if you can observe a pattern. Note how some will factor further than others and so must be accounted for. Since there are differences you will have to separate them into do this this way, and do that that way, depending on the exponent ...but there IS a pattern in the first stage of each. Try also looking into the geometric series for a similar pattern. 

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