February 2021 0 62 Report
Bonjour j'ai besoin de votre d'aide je n'y arrive pas: Développer et réduire les expressions suivantes:

4 (3a+5) - 3 (5a-4)
5 (-3b+2)+(3a-2)(4a-7)
(2b-3)(2b-7)+(5a+7)(4a+1)
(3a-4)(5a+2)-(-4a+17)(-3a-21)
(3a-4)²-2(-4a-11)²
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