Réponses

2012-12-13T19:52:32+01:00

A = (4x -1)² + (x +2)²

A = 16 x² -8x +1 + x² +4x +4 = 17x² -4x +5

 

B= (5a +4)² + (5t +4)(5t-4)

 

25a² +40a +16 + 25t² -16

25a² + 25t² +40a