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Sagot :

Bonjour,

4(3x+7) = 12x+28

2x(8+6x) = 16x+12x²

a(8-3a) = 8a-3a²

(5-4b)9 = 45-36b

3y(5-8y) = 15y-24y²

(6n-3)(-4n) = -24n²+12n

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