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URGENT !
Descompuneti in factori ireductibili expresia: 
  x^{4} [/tex] - [tex] x^{2} [/tex] + 1



Răspuns :

[tex] x^{4}- x^{2} +1= x^{4}+2 x^{2} +1-3 x^{2} = (x^{2} +1)^{2} -3 x^{2} = \\ \\ =\boxed{ (x^{2} +1+x \sqrt{3})( x^{2} +1- x\sqrt{3})  }.[/tex]