Răspuns :
(x²+x+1)² -(x²+x)² = [tex](x^{4} + x^{2} + 1) - ( x^{4} + x^{2} ) = x^{4}+x^{2} - x^{4} + x^{2} = 0 [/tex]
(x²+x+1)² -(x²+x)² = 1
*poza e mai corecta *
(x²+x+1)² -(x²+x)² = 1
*poza e mai corecta *
E(x) = (x² + x+ 1 +x² +x)( x² +x +1 - x² - x) = (2x² + 2x +1)·1 = 2x² + 2x +1