Bonjour, j'ai besoin d'aide pour un exercice en maths. a. (x+...)²=...+...+16
b. (...-5)²=100x² - ...+....
c. (2x+...)²=...+12x+...
d. (x-...)(x+...)=...-16
e. (...+1) (...-1) = 49x²-...
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