Exercices complémentaires |
Série A5) Supprime les parenthèses et réduis les éventuels termes semblables. |
2a
– (3a – 5b) |
= 2a – 3a + 5b |
| = – a + 5b | |
–
4x + (2 – 3x) |
= – 4x + 2 – 3x |
| = – 7x + 2 | |
(–
x + 2) – (5x + 3) |
= – x + 2 – 5x – 3 |
| = – 6x – 1 | |
–
(x – 2) + (– 2x – 4) |
= – x + 2 – 2x – 4 |
| = – 3x – 2 | |
6a
– (–a + 2) |
= 6a + a – 2 |
| = 7a – 2 | |
a
– (a – 3) + (5 – a) |
= a – a + 3 + 5 – a |
| = – a + 8 | |
2x
+ (x – 3) – (x + 2) |
= 2x + x – 3 – x – 2 |
| = 2x – 5 | |
(–
3 + x) + (2x – 4) (x + 6) |
= – 3 + x + 2x – 4 – x – 6 |
| = 2x – 13 | |
–
(a – 3) + (– 2a – 5) – (–a + 2) |
= – a + 3 – 2a – 5 + a – 2 |
| = –2a – 4 | |
6
– (2a – 5) + (– 2a + 4) |
= 6 – 2a + 5 – 2a + 4 |
| = – 4a + 15 |