Respuestas

2012-10-18T01:09:26+02:00

(3x+4)= 3x+4 

(-4x-3)(+2x-2)= -8x² +8x- 6x² +6 = -14x²+8x + 6

 (-5x-4)(-3x-2) = 15x² +10x +12x² +8 = 27x²+10x+8 

4 (-2x+4) (+2x-4)=-4x² +8x +8x -16 = -4x² +16x -16 

(x+1)= x+1