Bonjour/Bonsoir, merci de m'aider car je ne comprends pas. Merci. Consigne : Développer puis réduire les expressions suivantes :

A = (-4メ-1) (メ-9)
B = (3メ²-4メ+9)-(4メ²-メ+1)
C = 3(7メ²-1)-4メ(3-5メ)
D = (3メ-メ)(4メ-8)
メ = x (ex : 2x²)
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