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Sagot :

SULKY
Bonsoir, 

E = 4(4a - 2)
E = 16a - 8

F = 5(4a - 5) + 3(3b - 8)
F = 20a - 25 + 9b - 24
F = 20a + 9b - 49

H = 800a - 80b
H = 80 * 10a - 80 * b
H = 80(10a - b)
MONSIEURFIRDOWN
Bonjour

♧ Développer réduire:

E = 4(4a-2)
E = 4×4a + 4×(-2)
E = 16a - 8

F = 5(4a-5) + 3(3b-8)
F = 5×4a + 5×(-5) + 3×3b 3×(-8)
F = 20a - 25 + 9b - 24
F = 20a + 9b - 49

♧ Factoriser :

H = 800a - 80b
H = 80×10a - 80×1b
H = 80(10a-b)

Voilà ^^

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