我唔識做呀...
1)
2x^2+x-1
2)
4x^2-4x-3
3)
6x^2+x-2
4)
2x^2+13x+20
5)
8x^2+10x-3
6)
2x^2-7x-15
要步驟...謝
因式分解問題
2006-11-10 1:06 am
回答 (3)
2006-11-10 1:41 am
1. 2x^2 + x - 1
= (2x - 1)(x + 1)
2. 4x^2 - 4x - 3
= (2x - 3)(2x + 1)
3. 6x^2 + x - 2
= (2x - 1)(3x + 2)
4. 2x^2 + 13x + 20
= (2x + 5)(x + 4)
5. 8x^2 + 10x - 3
= (4x - 1)(2x + 3)
6. 2x^2 - 7x - 15
= (2x + 3)(x - 5)
= (2x - 1)(x + 1)
2. 4x^2 - 4x - 3
= (2x - 3)(2x + 1)
3. 6x^2 + x - 2
= (2x - 1)(3x + 2)
4. 2x^2 + 13x + 20
= (2x + 5)(x + 4)
5. 8x^2 + 10x - 3
= (4x - 1)(2x + 3)
6. 2x^2 - 7x - 15
= (2x + 3)(x - 5)
2006-11-10 1:35 am
1. 2x^2 + x - 1
= (2x - 1)(x + 1)
2. 4x^2 - 4x - 3
= (2x - 3)(2x + 1)
3. 6x^2 + x - 2
= (2x - 1)(3x + 2)
4. 2x^2 + 13x + 20
= (2x + 5)(x + 4)
5. 8x^2 + 10x - 3
= (4x - 1)(2x + 3)
6. 2x^2 - 7x - 15
= (2x + 3)(x - 5)
= (2x - 1)(x + 1)
2. 4x^2 - 4x - 3
= (2x - 3)(2x + 1)
3. 6x^2 + x - 2
= (2x - 1)(3x + 2)
4. 2x^2 + 13x + 20
= (2x + 5)(x + 4)
5. 8x^2 + 10x - 3
= (4x - 1)(2x + 3)
6. 2x^2 - 7x - 15
= (2x + 3)(x - 5)
2006-11-10 1:13 am
1)2x^2+x-1=(2x-1)(X=1)
2)4x^2-4x-3=(2X-3)(2X+1)
3)6x^2+x-2=(3X+2)(2X-1)
4)2x^2+13x+20=(2X-5)(X-4)
5)8x^2+10x-3=(4X-1)(2X+3)
6)2x^2-7x-15=(2X+3)(X-5)
2)4x^2-4x-3=(2X-3)(2X+1)
3)6x^2+x-2=(3X+2)(2X-1)
4)2x^2+13x+20=(2X-5)(X-4)
5)8x^2+10x-3=(4X-1)(2X+3)
6)2x^2-7x-15=(2X+3)(X-5)
收錄日期: 2021-04-13 00:34:56
原文連結 [永久失效]:
https://hk.answers.yahoo.com/question/index?qid=20061109000051KK02320