August 2021 0 199 Report
8 Les propositions suivantes sont-elles vraies
ou fausses ? Cochez la bonne réponse.
V
a. (5-2y)2 = 10 - 20y + 4y2
b. (x-7)2 = (7 - x)?
c. (9 + 3a) (9-3a) = 81-3a2
d. (x + 11)2 = x2 + 121
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