Réponses

  • Utilisateur Brainly
2014-03-16T18:04:18+01:00
(4x+6)(5x+3)
=20x²+30x+12x+18
=20x²+42x+18

(3x+8)(5x-7)
=15x²-21x+40x-56
=15x²+19x-56

(4x+6)(5x+3)
=20x²+30x+12x+18
=20x²+42x+18

(3x+8)(5x-7)
=15x²-21x+40x-56
=15x²+19x-56