Réponses

2012-12-15T18:56:52+01:00

A=-7x²-14-(7x+14+x²+2x)

=-7x²-14-7x-14-x²-2x

=-8x²-9x-28

 

B=-36x²+45x-(4x-8x²-5+10x)

=-36x²+45x-4x+8x²+5-10x

=-28x²+31x+5

2012-12-15T19:02:08+01:00