Răspunsuri

2014-11-09T17:30:28+02:00
(x²+x+1)² -(x²+x)² = (x^{4} + x^{2} + 1) - ( x^{4} + x^{2} ) =  x^{4}+x^{2} - x^{4} + x^{2} = 0
 (x²+x+1)² -(x²+x)² = 1
 *poza e mai corecta * 
2014-11-09T17:30:45+02:00
E(x) = (x² + x+ 1 +x² +x)( x² +x +1 - x² - x) = (2x² + 2x +1)·1 = 2x² + 2x +1