Răspunsuri

2014-11-15T09:07:25+02:00
 (x+1)^4 + 2·(x+1)² +1 = [(x+1)² +1]²
(x+1)^4 + (x+1)² +1 = [(x+1)² + 1]² - (x+1)² = [(x+1)² +1+(x+1)][(x+1)² +1 -(x+1)] =
= (x² +2x  +1 +1 +x+1)(x² +2x +1+1 - x- 1) = (x² +3x +3)(x² +x+1)