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Sagot :

Bonjour,

A= 5 ( 2x + 3)

= 10x+ 15

B = 3a ( 2a-5)

= 6a²- 15a

C=-5y (1 + 3y)

= -5y -15y²

D = 8 (a - 3)-5 ( a +3).

= 8a -24 -5a -15

= 3a -39

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