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Sagot :

Bonjour,

A)

4x +8 +x² +2x

= x² +6x +8

B)

10y +30 -2y² -6y

= -2y² +4y +30

C)

5a -30 -3a² +18a

= -3a² +23a -30

petite erreur de frappe!

Excuse-moi!

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