Odpowiedzi

2010-01-07T21:14:17+01:00
A)
x(x^2-1)-(x-1) = x[(x-1)(x+1)]-(x-1)=x(x+1)(x-1)-(x-1)=
= (x-1)[(x+1)x-1]
b)
3(x + 2)^2 - x - 2= 3(x+2)^2 - (x+2) = (x+2)[3(x+2)-1]
c)
(x +1)^4 - (x +2)^2 = [(x+1)^2-(x+2)][(x+1)2 + (x+2)]