[Blindmath] Help factoring a crazy trinomial

[Jon Yaggie]

Well 1 and -1 are not roots. You can see that by testing them. To solve it make a substitution of t=x^2 and solve t^2-2t-1. 

Jon Yaggie


> On Oct 23, 2013, at 13:49, "GianniP46" <giannip46 at earthlink.net> wrote:
> 
> Hi all,
> I need help factoring X^4-2X^2-1
> 
> I am thinking that there is a way of re writing this as a four termed expression where the product of the first and last terms must equal the product of the two middle terms, but I am stuck :(
> I know the answer is (X+1)(X-1)(X+1)(X-1)
> Feeling very dumb, any help would be appreciated THANKS lol
> 
> Gian Pedulla
> Giannip46 at earthlink.net
> 
> LETS GO METS!
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