Bonjour, j’y arrive vraiment pas, un peu d’aide m’aiderai un peu merci ! Réduis les expressions suivantes :
A = 2x - 3 + 4x" + 7 - 5x + x2
B = 4x - 2x - 3 + 5 - 3 + x
C = 7 - 2 + 4a - 2 - 2a+ 9+ a - 5
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