中二數學(因式分解)

回答 (4)

2013-11-10 7:24 pm
✔ 最佳答案
1. 8a(a - 2x)

2. -5x(a + 4b)

3. 2(a + 2b + 3c)

4. (s - v)(s - t)

5. (2b - 1)(b - 3a)

6.-4a² + 3b

7.5x(y + 2x)(y - 2x)

8. 2(5a + 3bc)(5a - 3bc)

9. 2ac(abc + 12)(abc - 12)

10.2(x + 5)²

11.3(3c - d)²

12. (a - 4)²

2013-11-11 19:31:45 補充:
http://www.wolframalpha.com/
2013-11-10 8:18 am
偉大的 Masterijk ~~~~~~~~~~~~
2013-11-10 7:01 am
Masterijk thank !
2013-11-10 6:48 am
我已解答,但被指違規,可能又有字眼觸動了系統~

1. 8 a (a - 2x)

2. -5x (a + 4b)

3. 2(a + 2b + 3c)

4. s(s - t) - v(s - t) = (s - v)(s - t)

5. 2b(b - 3a) - (b - 3a) = (2b - 1)(b - 3a)

2013-11-09 22:49:26 補充:
6. a² - 2b + 5b - 5a² = -4a² + 3b 不能因式分解

7. 5x (y² - 4x²) = 5x(y + 2x)(y - 2x)

8. 2(25a² - 9b²c²) = 2(5a + 3bc)(5a - 3bc)

9. 2ac(a² b² c² - 144) = 2ac(abc + 12)(abc - 12)

2013-11-09 22:49:48 補充:
10. 2(x² + 10x + 25) = 2(x + 5)²

11. 3(9c² - 6cd + d²) = 3(3c - d)²

12. a(a² - 8a + 16) = a(a - 4)²


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