Réponses

2014-03-14T22:57:13+01:00

Développer :

A=6(a-2)+(4-2a)-(-3+5a)= 

A = 6a - 12 + 4 - 2a + 3 - 5a =

A = -a-7

B=(3a-2)-(-4a+5)+3ax(-2axa)

B = 3a - 2 + 4a -5 - 6 a³

B = 7 a - 7 - 6 a³

B = - 6a³ + 7a -7

factoriser :

C=25axa-5a

C = 5 a (5a - 1 )

2014-03-14T23:42:49+01:00
A=6(a-2)+(4-2a)-(-3+5a)
A = 6a - 12 + 4 - 2a + 3 - 5a
A = -a-7

B=(3a-2)-(-4a+5)+3ax(-2axa)
B = 3a - 2 + 4a -5 - 6 a³
B = 7 a - 7 - 6 a³
B = - 6a³ + 7a -7f

C=25axa-5aC
C= 5 a (5a - 1 )