Réponses

2013-11-24T12:22:43+01:00
a. 5x+3x
=x(5+3)
=8x

b. 3x-8x
=x(3-8)
=-5x

c. -4x+15x
=x(-4+15)
=11x

d. -9x-6x
=x(-9-6)
=-15x
2013-11-24T12:24:08+01:00
 a.x(5+3)            a.8x
b.x(3-8)             b.-5x
c.x(-4+15)         c.11x
d.x(-9-6)            d.-15x