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2013-03-24T15:21:35+01:00

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)