Répondre :
38.
A = 37,5 – 6a
B = -40x + 30
C = 12t – 60
D = -4,8x + 2,4
E = -12a/3 – 24/3
F = 264ycarré/ 6 -22/6
39.
a) 7(5x+2)
b) -7y(7y-2)
c) 5y (5y+2)
d) 6x(6-2x)
38.
A = 37,5 – 6a
B = -40x + 30
C = 12t – 60
D = -4,8x + 2,4
E = -12a/3 – 24/3
F = 264ycarré/ 6 -22/6
39.
a) 7(5x+2)
b) -7y(7y-2)
c) 5y (5y+2)
d) 6x(6-2x)