b)
|
Applique la distributivité simple. |
2
.
(a + b) =
|
2
. a + 2. b
2a + 2b |
a
. (a
+ b) =
|
a
. a + a . b
a2 + ab |
a
.
(2b + c) =
|
a
. 2b + a . c
2ab + ac |
2a
. (b
+ 3a) =
|
2a
. b + 2a . 3a
2ab + 6a2 |
3a
.
(2b + 4c) =
|
3a
. 2b + 3a .
4c
6ab + 12ac |
x
. (x
+ 2y) =
|
x
. x + x . 2y
x2 + 2xy |
2
.
(b + 1) =
|
2
. b + 2 . 1
2b + 2 |
b
. (c
+ 3b) =
|
b
. c + b . 3b
bc + 3b2 |
3
.
(a + 5) =
|
3
. a + 3 . 5
3a + 15 |
6a
.
(a + 2b) =
|
6a
. a + 6a . 2b
6a2 + 12ab |