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Re: express a quadratic, in the form (x+a)^2 + b


Hi,

x^2 + 4 x + 7 /.
  x^2 + b_*x + c_ :> Factor[x^2 + b*x + b^2/4] - b^2/4 + c

Regards
   Jens

Joseph Fagan wrote:
> I'm a Mathematica beginner.
> I wish to express a quadratic, in the form (x+a)^2 + b
> eg to express x^2 + 4x + 7 as (x+2)^2 + 3
> Is there an easy way?
> Thanks
> Joe
> 
> 
> 


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