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Sagot :

Bonjour

A=3(x-1/3)

=3x-1

B=2x(1/2 x+1)

=x²+2x

C=2/5(5x+15)

=2x+6

Et voilà! ;)

Bonjour,

A= 3x -3/3 = 3x-1

B= 2x/2 *x+ 2x =  x*x +2x = x² +2x

C= 10x/5 +30/5 = 2x +6

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