bonjour
A = 1,6 (r - 0,5)
A = 1.6 r - 0.8
B = 7 (3x - 8) = 21 x - 56
C = 3r (x - 5) = 3 rx - 5 r
D = 6x (2 + 9.r ) = 12 x + 54 xr
E = 4 (4 - 9) manque les lettres
F = -8 (-5 - 3r ) = 40 + 24 r
Trouve l'intrus en justifiant ta réponse :
A = 4(2x - 3) = 8 x - 12
B = 8r - 12
C = 5(x - 4) + 3x + 8
C = 5 x - 20 + 3 x + 8 = 8 x - 12
D = 10 (x - 1) - 2x
D = 10 x - 10 - 2 x = 8 x - 10
E = 6 (2x - 3) + 2/3 - 2x)
E = 12 x - 18 + 2/3 - 2 x
= 10 x - 54/3 + 2 /3 = 10 x - 56/3