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Cum se descompune x la puterea 2 - 2x + 1 ?

Răspuns :

x²-2x+1 x²-x-x+1 x(x-1)-1 (x-1)(x-1) =(x-1)²
 [tex] x^2-2x+1=(x-1)^2\\ (am \,aplicat\,formula\;a^2-2ab+b^2=(a-b)^2[/tex]