Respuestas

2013-01-14T19:33:30+01:00

a/ (x3 + 2x -3) - (-x3 + x2- 1) = 2x3 - x2 +2x-2

 

b/ (2x4 + x3 - x2) + (2x4 - 23 + x + 1) = 4x4 + x3 - x2 + x -22