Réponses

  • x22
  • Modérateur Junior
2014-10-14T18:04:27+02:00
Bonsoir,

(8b+3)(5b+3)+3(8b+3)
=8b*5b+8b*3+3*5b+3*3+3(8b+3)
=40b²+24b+15b+9+3(8b+3)
=40b²+39b+9+3(8b+3)
=40b²+39b+9+3*8b+3*3
=40b²+39b+9+24b+9
=40b²+73b+9+9
=40b²+73b+18