Réponse :
Bonsoir
Explications étape par étape
Exercice 3
A = -5s -10s -4 +4 -3s² - (-7)s²
A = -15s -3s² +7s²
A = -15s +4s²
B = 6w -1 -8w² +3w² +3w -4
B = 9w -5 -5w²
C = -6v - (-9) -4v² -4 -5v² -v
C = -6v +9 -4v² -4 -5v² -v
C = -9v² -7v +5
D = 7 X (-y) X (-6) X 9y - (-9)y²
D = -7y X -6
D = +42y X 9y
D = 378 y² +9y²
D = 387y
E = -6 X (-2) X t +9t² -9t
E = +12t +9t² -9t
E = 9t² +3t
F = -3y X (-5) X -y X -2 -30y²
F = +15y X -y
F = -15y² X -2 -30y²
F = +30y² -30y² = 0
