Hello pouvait vous m'aider pour mon DM de math voici mon exercice et mercie d'avance

a) Réduire les expressions suivantes :
A = 3 x+5 x−2
A =
B = 4×3−x
B =
C = 3 x×2– 5
C =
D = 6×2– 3x×5 x
D =
b) Développer et réduire les expressions suivantes
A = 2(x+6)
A =
A =
B = 3(7−y)
B =
B =
C = 4 x (6−2 x)
C =
C =
D = 6 x+5(x ²−2 x)
D =
D =
c) Factoriser les expressions suivantes
A = 8+16 x
A =
A =
B = 25 x−40
B =
B =
C = 4 x+6 x
2
C =
C =
D = 5 x ³+14 x
2
D =
D =
d) Calculer les expressions suivantes pour x = - 3
A = 5 x+4
A =
A =
B = 3(x−7)
B =
B =
C = x ²−8
C =
C =
D = 3 x ² –5 x+9
D =
D =
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