Réponses

2014-10-31T13:42:35+01:00
5x(-4x+12)= -20x²+60x

-6(3y+15)=-18y+90 

5x+3(-6x+10)-20=5x-18x+30-20=-13x+10
  • Utilisateur Brainly
2014-10-31T13:47:03+01:00
5x( - 4x + 12)
= - 20x² + 60x

- 6(3y + 15)
= - 18y - 90

5x + 3(- 6x + 10) - 20
= 5x - 18x + 30 - 20
= - 13x + 10