Respuestas

2012-05-26T03:46:20+02:00
  • Usuario de Brainly
2012-05-26T04:59:57+02:00

 a + [( b – a) – (b – c)]= c 

2x+3x = 5x (3x2+2x) + (4x2+3x) = 7x2+5x