| f) | Ecris sans parenthèses. |
| (5
x)2 = |
52
. x2 |
(x
+ 2) . (x – 2) = |
x2
– 22 |
= |
25
x2 |
= |
x2
– 4 |
| 5
. (x + 2) = |
5
. x + 5 . 2 |
(x
+ 3) . (x – 2) = |
x2
– 2 x + 3 x + 2 . 3 |
= |
5
x + 10 |
= |
x2
+ x + 6 |
| (5
+ x)2 = |
52
+ 2 . 5 . x + x2 |
(x
+ 3) . (x + 3) = |
x2
+ 2 . x . 3 + 32 |
= |
25
+ 10 x + x2 |
= |
x2
+ 6 x + 9 |
| 5
– (x – 2) = |
5
– x + 2 |
(x
+ 3) – (x – 3) = |
x
+ 3 – x + 3 |
= |
7
– x |
= |
6
|
(5
– x) . 2 = |
10
– 2x |
(x
– 3) . (3 – x)
= |
3
x – x2 – 9 + 3 x |
| |
= |
– x2 + 6 x – 9 |