| 3a | 2a | 6a2+10a | −5 | −1 | ||||||
Wyrażenie ( | + | ): | , dla a≠ | , a≠ | , a≠0, | |||||
| 1−3a | 1+3a | 1−6a+9a2 | 3 | 3 |
| 1 | ||
a≠ | , doprowadź do najprostszej postaci | |
| 3 |
| 1−6a+9a2 | ||
= U{3a(1+3a)+2a(1−3a)}{(1−3a)(1+3a)* | = | |
| 6a2+10a |
| 3a+9a2+2a−6a2 | 9a2−6a+1 | |||
* | = | |||
| 1−9a2 | 6a2+10a |
| 3a2+5a | 9(a−13)2 | |||
= | * | = | ||
| −9a2+1 | 6a2+10a |
| a(3a+5) | 9*(a−13)2 | |||
* | = | |||
| −9(a2−19) | a(6a+10) |
| 3a+5 | (a−13)2 | |||
= | * | = | ||
| −a2+19 | 6a+10 |
| 3a+5 | (a−13)2 | (a−13)2 | ||||
* | = | |||||
| −(a2−19) | 2(3a+5) | −(a−13)(a+13) |
| a−13 | ||
= | ||
| −a+13 |
| 1−3a | ||
W odpowiedzi jest: | . | |
| 2(1+3a) |
|
| |||||||||||||||||||||||||||
...= | = | =... | ||||||||||||||||||||||||||
|
|
| 3 | 2 | (3a−1)2 | ||||
w=a*( | + | )* | = | |||
| 1−3a | 1+3a | 2a*(3a+5) |
| 3+9a+2−6a | (3a−1)2 | |||
= | * | = | ||
| (1−3a)*(1+3a) | 2*(3a+5) |
| 1 | (3a−1)2 | |||
= | * | = | ||
| −(3a−1)*(1+3a) | 2 |
| −1 | 3a−1 | 1−3a | ||||
= | * | = | ||||
| (1+3a) | 2 | 2(3a+1) |
| a−13 | ||
Zostaje mi | , to chyba już jest to samo prawda? | |
| −2(a+13) |
| 1 | ||
a0= | ||
| 3 |
| 1 | 1 | 1 | ||||
można też: 9(a− | )2=32(a− | )2=[3(a− | )]2=(3a−1)2 | |||
| 3 | 3 | 3 |