Bonjour,
Exercice 1
A = -2a × 5b
A = -10ab
A = -10 × -3
A = +30
B = a² × b²
B = (ab)²
B = (-3)²
B = +9
C = (-a) × (-b)
C = -a×-b
C = ab
C = -3
D = 6a × (-b)
D = -6ab
D = -6 × -3
D = +18
Exercice 2 :
Un carré ABCD de côté 6 cm.
Faire un schéma (voir document ci-joint)
Exercice 3
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Exercice 4
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