Pourriez-Vous M'aider SVP.

5) Ecrire sans parenthèse chaque expression.

a. - (3 + ixe)

b. - (2a + 4)

c. - (-3 + ixe)

d. -(5 - ixe)

e. - (7 - 2y)

f. - ( -6 - 4ixe)

Pour Les exercices 16 à 18.

Supprimer les parenthèse, plus réduire chaque expression.

16) a. 25 - (2a - 3)

b. 3a - (-2a + 7)

c. - (a + 3b) + (b - 2a)

d. (5 + ixe) - (7ixe - 5)

17) a. (ixe2 - 5ixe) + (2ixe2 + 7ixe - 8)

b. (3ixe2 - 5ixe - 4) - (-4ixe2 + 7ixe + 5)

18)

a. - (ixe - 8) + (6ixe - 1) - (7 - ixe)

b. ( 3a2 + 5a - 4) - (8a2 + 3a + 3
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