Réponses

2014-02-04T18:30:15+01:00
A = 3*( -4x + 2 ) - ( 4x - 1 )
A = 3*(-4x) + 3*(2) - 4x + 1
A = - 12x + 6 - 4x + 1
A = -16x + 7

B = 5x + 7 - 2*( 3x - 4 )
B = 5x + 7 - 2*3x -2*(-4)
B = 5x + 7 - 6x + 8
B = -x + 15