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2013-05-26T18:53:59+02:00

ex14

a=9(-3+y)

b=-12x=42

c=24t+16

d=-72+56x

e=-24z+24z²

2013-05-26T18:54:50+02:00

Bonsoir

 

N°15

 

A = x (x+4) = x²+4x

B = 6(2x-7) = 12x -42

c = -8z(4-3z) = -32z+24z²

D = (9-3t) x 4t = 36t -12t²

 

désolée, je ne vois que le 15