Exercice 1 Utilise ces conventions pour simplifier :
4c × (-5) × (-3a) =
2a+3a=
3cx2ax(-a)x4d =
-
-8 b 2,5+3b +3,5 =
3ax (-6) b x 4c =
7 4a 2ax 3 b-5-7bx 2a =
-7 x 4 bx c x 3 a =
axa a=
8cx7a-7a+7 × (- 3 a) × c +5a=
3x2-5x+6= x²+6x+12=