Réponses

2012-11-22T17:40:53+01:00

1)=2x²+12x+14x-4x+21x-6

   =2x²+43x-6

 

 2)=(2x+3)(2x+3+7x-2)

=(2x+3)(9x+1)

 

3)=2*4²+43*4-6

=2*16+172-6

=32+166

=198

2012-11-22T17:54:24+01:00

)=2x²+12x+14x-4x+21x-6

   =2x²+43x-6

 

2)=(2x+3)(2x+3+7x-2)

=(2x+3)(9x+1)

 

3)=2*4²+43*4-6

=2*16+172-6

=32+166

=198


 Voila ! :)