Aider moi svp la 4 jl’ai fait j’vous met meilleure reponse ..

Bonsoir,

Exercice 1
Avec 421 DVD = ça marche
421 ÷ 2 =  110 reste 1
421 ÷ 3 = 140 reste 1
421 ÷ 4 = 105 reste 1
421 ÷ 5 = 84 reste 1
Abdel aurait 421 DVD

Exercice 2
1) E =(x +5) (2x-3) -5(x+2)
E = 2x² -3x +10x -15 -5x-10
E = 2x² +2x -25

2) pour x = 0
E = (2×0²) + (2×0) - 25
E = -25

Pour x = -5
E = (2× -5²) + (2×-5) -25
E = 50 -10 -25
E = 50 - 35
E = 15

Exercice 3
Sarah has got 8 red boxes with 5 candles in each ( 8×5=40)
Sarah has got 3 blue boxes with 4 candles in each (3×4=12)
Total 40 + 12 = 52