Sagot :

Bonsoir,

a)

2x+4 +4x -1

= 6x +3

b)

-3x +1 -2x +7

= -5x +8

c)

-15 +12x

d)

-20x² +16x +10x -8

= -20x² +26x -8

e)

IR

16x² -32x +16

A=

3x² +9 +x² -x +2x -2

= 4x² +x +7