1)EXERCICE
A= 3x+6
=3(x+2)
B= -5(2y+7)
-5×2y-5×7
= -10y-35
C= 4w au carré
= (2w)au carré
D= 2u×(5-7)
4u×5-4u×2u
20u-4u×2u
=20-8u au carré
2) EXERCICE
E=5x+(2x-3)
5x+2x-3
=7x-3
F=3x-(-x+7)
3x+x-7
=4x-7
3) EXERCICE
G= 5x-4+7x-8x+6
4×-4+6
4x+2
=2(2x+1)
H= ?
5) EXERCICE
M=6(x+2)
6x+6×2
6×12
6×+12
N=12(4x-3)
12×4x-12×3
48x-12×3
=48x-36
6) EXERCICE
P= 7a-14
7(a-2)
7(a-2)
Q= 144+6×18
162+6x
162+6x
7)EXERCICE
R=3(x+5)-x
3x+15-x
2x+15
2x+15
S=3x×(-4+x)
-3x×4+3x×x
-12x+3x×x
-12x+3x au carré
T=(2x-3)(4+x)
2x×4+2x×x-3×4-3x
8x+2x×x-3×4-3x
8x+2x au carré -3×4-3x
8x2x au carré -12-3x
5x+2x au carré -12
2x au carré +5x-12
V= 5z(4x+3)(-2z-5)
(20×z-15z)×(-2z-5)
-40z au carré -100×z-30z au carré - 75z
bon courage....
