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Sagot :

MAUDMARINE

Bonjour

Calculer :

3y²+7y-5-7y-4y-4

= 3y² + 7y - 7y - 4y - 5 - 4

= 3y² - 4y - 9

-2y²-4y+3+5y²+6y-7

= - 2y² + 5y² - 4y + 6y + 3 - 7

= 3y² + 2y - 4.

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