因式分解
1.2ab-6cb
2.2ab-4bc+8bd
3.x^3-5x²
4.a(p-q)+b(p-q)
5.x(a+3b)-2y(a+3b)
6.x(a-7)+y(7-a)
中二數學(~急~)
2007-11-04 10:04 pm
回答 (6)
2007-11-04 10:37 pm
1. 2ab-6cb
=2b(a-3c)
2. 2ab-4bc+8bd
=2b(a-2c+4d)
3. x^3-5x²
=x^2(x-5)
4. a(p-q)+b(p-q)
=(p-q)(a+b)
5. x(a+3b)-2y(a+3b)
=(a+3b)(x-2y)
6. x(a-7)+y(7-a)
=x(a-7)-y(a-7)
=(a-7)(x-y)
=2b(a-3c)
2. 2ab-4bc+8bd
=2b(a-2c+4d)
3. x^3-5x²
=x^2(x-5)
4. a(p-q)+b(p-q)
=(p-q)(a+b)
5. x(a+3b)-2y(a+3b)
=(a+3b)(x-2y)
6. x(a-7)+y(7-a)
=x(a-7)-y(a-7)
=(a-7)(x-y)
2007-11-04 10:21 pm
1.2b(a-3c)
2.2b(a-2c+4d)
3.x^2(x-5)
4.(p-q)(a+b)
5.(a+3b)(x-2y)
6(a-7)(-x+y)
唔肯定100%啱哂
2.2b(a-2c+4d)
3.x^2(x-5)
4.(p-q)(a+b)
5.(a+3b)(x-2y)
6(a-7)(-x+y)
唔肯定100%啱哂
參考: 自己
2007-11-04 10:16 pm
1. 2b(a-3c)
2. 2b(a-2c+4d)
3. x²(x-5)
4. (p-q)(a+b)
5. (a+3b)(x-2y)
6. x(a-7)-y(a-7)
= (a-7)(x-y)
2. 2b(a-2c+4d)
3. x²(x-5)
4. (p-q)(a+b)
5. (a+3b)(x-2y)
6. x(a-7)-y(a-7)
= (a-7)(x-y)
2007-11-04 10:16 pm
1. 2ab-6cb
=b(2a-6c)
2. 2ab-4bc+8bd
=2b(a-2c+4d)
4. a(p-q)+b(p-q)
=(p-q)(a+b)
5. x(a+3b)-2y(a+3b)
=(a+3b)(x-2y)
6. x(a-7)+y(7-a)
=-1(x(a-7)) +(7-a)
=-x(-a+7)+(7-a)
=-x(7-a)+(7-a)
=(7-a)(1-x)
=b(2a-6c)
2. 2ab-4bc+8bd
=2b(a-2c+4d)
4. a(p-q)+b(p-q)
=(p-q)(a+b)
5. x(a+3b)-2y(a+3b)
=(a+3b)(x-2y)
6. x(a-7)+y(7-a)
=-1(x(a-7)) +(7-a)
=-x(-a+7)+(7-a)
=-x(7-a)+(7-a)
=(7-a)(1-x)
2007-11-04 10:15 pm
抽common factor.
1. 2b(a-3c)
2. 2b(a-2c+4d)
3. x^2(x-5)
4. (p-q)(a+b)
5. (a+3b)(x-2y)
6.x(a-7)+y(7-a)
先把a-7 轉為 -(-a+7)
然後轉次序 = -(7-a)
即變成 -x(7-a)+y(7-a)
= (7-a)(y-x)
1. 2b(a-3c)
2. 2b(a-2c+4d)
3. x^2(x-5)
4. (p-q)(a+b)
5. (a+3b)(x-2y)
6.x(a-7)+y(7-a)
先把a-7 轉為 -(-a+7)
然後轉次序 = -(7-a)
即變成 -x(7-a)+y(7-a)
= (7-a)(y-x)
參考: me
2007-11-04 10:12 pm
1.2b(a-3c)
2.2b(a-2c+4d0
3.睇唔明
4.(p-q)(a+b)
5.(a+3b)(x-2y)
6.-x(7-a)+y(7-a)=(7-a)(-x+y)
2007-11-04 14:13:43 補充：
2.2b(a-2c+4d)
2.2b(a-2c+4d0
3.睇唔明
4.(p-q)(a+b)
5.(a+3b)(x-2y)
6.-x(7-a)+y(7-a)=(7-a)(-x+y)
2007-11-04 14:13:43 補充：
2.2b(a-2c+4d)
收錄日期: 2021-04-13 14:19:24
原文連結 [永久失效]:
https://hk.answers.yahoo.com/question/index?qid=20071104000051KK02102