Respuestas

2014-03-11T20:32:19+01:00
= X4+5X3+9X2-7X+2[(X2+3X+2)(X2-2X+1)]
=X4+5X3+9X2-7X+2[X4-2X3+X2+3X3-6X2+3X+2X2-4X+2]
=X4+5X3+9X2-7X+2[X4+X3-3X2-X+2]
=X4+5X3+9X2-7X+2X4+2X3-6X2-2X+4
=3X4+7X3+3X2-9X+4

zulmita no es factorizacion sino simplificacion