| b)
|
Applique les propriétés des puissances. |
(–
3ab)4 |
= (– 3)4 . a4 . b4 = (– 3)4 . a4 . b4 = 81a4b4 |
5a3
. (– 2a3) |
= 5 . a3 . (– 2) . a3 = 5 . (– 2) . a3 . a3 = – 10a6 |
–
4a . 5a |
= – 4 . a . 5 . a = – 4 . 5 . a . a = – 20a2 |
(–
2a2b)5 |
= (– 2)5 . (a2)5 . b5 = – 32 . a10 . b5 = – 32 a10b5 |
x . (– 2x) |
= x . (– 2) . x = (– 2) . x . x = – 2x2 |
2b3. (– 2b) |
= 2 . b3. (– 2) . b = 2 . (– 2) . b3 . b = – 4b4 |
–
11x . 5x |
= – 11 . x . 5 . x = – 11 . 5 . x . x = – 55 x2 |
(–
a4b)3 |
= (– a4)3 . b3 = – a12 b3 |
–
2 . (– a5b2)4 |
= – 2 . (– a5)4. (b2)4 = – 2 . a20. b8 = – 2a20b8 |
x2
. (– 2x3) |
= x2 . (– 2) . x3 = (– 2) . x2 . x3 = – 2x5 |
(–
a3b2)2 |
= (– a3)2 . (b2)2 = a6b4 |
(–
2a5b2)4 |
= (– 2)4. (a5)4. (b2)4 = 16 . a20. b8 = 16a20b8 |
(–
b2) . (– 3b3) |
= (– b2) . (– 3) . b3 = (– 3) . (– b2) . b3 = 3b5 |
(–
5a2b3)2 |
= (– 5)2. (a2)2. (b3)2 = 25 . a4 . b6 = 25a4b6 |
–
2x . 4x |
= – 2 . x . 4 . x = – 2 . 4 . x . x = – 8 x2 |