Réponses

2014-05-07T20:25:15+02:00
A = 5(3x-7)  
a = 15x -35


B = x(9x+15)
b = 9x² +15x


C= 7X(8+5x)
c = 56x +35x²
2014-05-07T20:25:23+02:00
A= 5x3x + 5x(-7) 
= 15x - 35

B= x x 9x + x x 15 
= 9x(au carré) + 15x 

C= 7x x 8 + 7x x 5x 
=56x(au carré) + 35x(au carré)