|
c)
|
Réduis les expressions qui peuvent l'être. |
6a
+ 2a |
= 8a |
3a
. 4 |
= 3 . a . 4 = 3 . 4 . a = 12a |
2a
+ 5b |
=
2a + 5b |
6a
. 3a |
= 6 . a . 3 . a = 6 . 3 . a . a = 18a2 |
3
. a4 |
=
3a4 |
(2a
+ 5) . b |
= 2a . b + 5 . b = 2ab + 5b |
6a
. 3 |
= 6 . a . 3 = 6 . 3 . a = 18a |
(3a)4 |
= (3)4 . (a)4 = 81a4 |
2
. (a + 5) |
= 2 . a + 2 . 5 = 2a + 10 |
(6a)3
|
= (6)3 . (a)3 = 216a3 |
3a
+ 4 |
=
3a + 4 |
2a
. 5b |
= 2 . a . 5 . b = 2 . 5 . a . b = 10ab |
6
. a3 |
=
6a3 |
3
. (a + 4) |
= 3 . a + 3 . 4 = 3a + 12 |
(2ab)5 |
= 25 . a5 . b5 = 32a5b5 |
3a
– 4b |
=
3a – 4b
|
3x2
– x |
= 3x2
– x |
5a2
+ 2a5
|
=
5a2 + 2a5 |
3a . (– 4b)
|
= – 12 ab
|
3 . (x4 – x)
|
= 3 . x4 – 3 . x = 3 x4 – 3 x |
5a2 . 2a5
|
= 10 a7
|
(3a – 4) . b
|
= 3a . b – 4 . b = 3ab – 4b |
(3x)2
|
= (3)2 . (x)2 = 9x2 |
5 . (a2 + 2a5)
|
= 5 . a2 – 5 . 2a5 = 5a2 – 10a5 |
3 . (a – 4)
|
= 3 . a – 3 . 4 = 3a – 12 |
3
.
x2 |
=
3x2 |
5a2
.
(2
– a5) |
= 5a2. 2 – 5a2 . a5 = 10a2 – 5a7 |
(3a)2
|
= (3)2 . (a)2 = 9a2 |
3 x2 . (– x)
|
= – 3x3
|
(5a2
+ 2) .
(– a5)
|
= (5a2) . (–a5) + 2 . (–a5) = – 5a7 – 2a5 |