2. 5m2次-5m
3. -2x+10x2次
4. 6a(c-d)+5b(c-d)
5. x(x+5)-3(5-x)
6. -2(x-y)x-9(x-y)y
請大家連埋算色答,唔好剩係比答案我,PLZ
20點!!!
識即係答,因為我緊急!thx,十萬thx!!
更新1:
咩係^唔明
中2因色分解,20點!!!
2009-10-23 3:17 am
1. x2次+4x
2. 5m2次-5m
3. -2x+10x2次
4. 6a(c-d)+5b(c-d)
5. x(x+5)-3(5-x)
6. -2(x-y)x-9(x-y)y
請大家連埋算色答,唔好剩係比答案我,PLZ
20點!!!
識即係答,因為我緊急!thx,十萬thx!!
2. 5m2次-5m
3. -2x+10x2次
4. 6a(c-d)+5b(c-d)
5. x(x+5)-3(5-x)
6. -2(x-y)x-9(x-y)y
請大家連埋算色答,唔好剩係比答案我,PLZ
20點!!!
識即係答,因為我緊急!thx,十萬thx!!
回答 (3)
2009-10-23 3:53 am
1) x2次+4x
=x(x+4)
2) 5m2次-5m
=5(m2次-m)
=5m(m-1)
3) -2x+10x2次
=2(-x+5x2次)
=2x(-1+x)
4) 6a(c-d)+5b(c-d)
=(c-d)(6a+5b)
6) -2(x-y)x-9(x-y)y
=(x-y)(-2x-9y)
=x(x+4)
2) 5m2次-5m
=5(m2次-m)
=5m(m-1)
3) -2x+10x2次
=2(-x+5x2次)
=2x(-1+x)
4) 6a(c-d)+5b(c-d)
=(c-d)(6a+5b)
6) -2(x-y)x-9(x-y)y
=(x-y)(-2x-9y)
2009-10-23 3:41 am
1)x^2+4x
睇有咩一樣...有x!咁就抽x啦
=x(x+4)
好易嫁炸..咁就分解完啦=
2. 5m2次-5m
可以抽5m..因為兩邊都有5m
=5m(m-1)
3. -2x+10x2次
=-2x(1-5x)
4. 6a(c-d)+5b(c-d)
=(c-d)(6a+5b)
5. x(x+5)-3(5-x)
=x(x+5)+3(x-5)
=(x)^2-(5)^2+(x+3)
=(x+5)(x-5)+(x+3)
6. -2(x-y)x-9(x-y)y
=(x-y)(-2-9乘y)
= -11y(x-y)
睇有咩一樣...有x!咁就抽x啦
=x(x+4)
好易嫁炸..咁就分解完啦=
2. 5m2次-5m
可以抽5m..因為兩邊都有5m
=5m(m-1)
3. -2x+10x2次
=-2x(1-5x)
4. 6a(c-d)+5b(c-d)
=(c-d)(6a+5b)
5. x(x+5)-3(5-x)
=x(x+5)+3(x-5)
=(x)^2-(5)^2+(x+3)
=(x+5)(x-5)+(x+3)
6. -2(x-y)x-9(x-y)y
=(x-y)(-2-9乘y)
= -11y(x-y)
參考: me!
2009-10-23 3:31 am
1. x2次+4x
= x^2 + 4x
= x(x + 4)
2. 5m2次-5m
= 5m^2 - 5m
= 5m(m - 1)
3. -2x+10x2次
= -2x + 10x^2
= 2x(-1 + 5x)
= 2x(5x - 1)
4. 6a(c-d)+5b(c-d)
= (6a+5b)(c-d)
5. x(x-5)-3(5-x)
= x(x-5) + 3(x-5)
= (x+3)(x-5)
6. -2(x-y)x-9(x-y)y
= (x-y)(-2x - 9y)
= (y - x)(2x + 9y)
= x^2 + 4x
= x(x + 4)
2. 5m2次-5m
= 5m^2 - 5m
= 5m(m - 1)
3. -2x+10x2次
= -2x + 10x^2
= 2x(-1 + 5x)
= 2x(5x - 1)
4. 6a(c-d)+5b(c-d)
= (6a+5b)(c-d)
5. x(x-5)-3(5-x)
= x(x-5) + 3(x-5)
= (x+3)(x-5)
6. -2(x-y)x-9(x-y)y
= (x-y)(-2x - 9y)
= (y - x)(2x + 9y)
收錄日期: 2021-04-21 22:06:12
原文連結 [永久失效]:
https://hk.answers.yahoo.com/question/index?qid=20091022000051KK01087