Odpowiedzi

2010-01-21T13:33:01+01:00
(a+b)x² +(a +b) x² +(a + b) x =(a + b)x(x+x+1)=x(a+b)(2x+1)
chyba o to chodziło

(x + 1) x² +( x + 1) (1 -x)² =(x +1)(x²+(1-x)²)=(x+1)(x²+1-2x+x²)=
=(x+1)(2x²-2x+1)