Respuestas

2013-03-14T23:09:32+01:00

x + x^ 2 - xy^2 - y^2= (x + x^ 2)(xy^2 - y^2)  x(1+x)y2(x-1) = -(x+1)(x+2y)

 

3a - b^2 + 2b^2x - 6ax= (3a-6ax)(-b2+2b2x)= 3a(1-2x) -b2(1-2x) =(3a-b2)(1-2x)