Aidez-moi SVP.JE DOIS LE RENDRE DEMAIN

EXERCICE :1 DÉVELOPPER ET RÉDUIRE;
(-2y + 4) - (-9 - 3y)
7 - (-3x + 2) - (-4x)
-3 (-y - 5)
EXERCICE:2 Factoriser
1/: x² + x
2/: 9y - 1 x 9

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