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Sagot :

La reponse du petit a est 12x
ALEK75

b) (y+1)(y+5) = y² +6y +5

c) (2a-2)(1+3a) = 6a²-4a-2

d) (b-1)( 5-b) = -b²+6b-5

e) (-y+5)(y-5) = -y²+10y-25

f) (6y-9)(4y-8) = 24y²-84y+72

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