點樣化簡下面d化數式/如果係正負數,我會用( )表示/give u 15點~~!!!
1. 3a+6+2a+8=? 2. 2m-4n+(-7m)+3n=?
3. (-5a)-4b+(-2a)+2b=? 4. 4a+2b-3a-6b=?
5. 3x-2y-2x+y=? 6. 4b-3-2b+2=?
7. 3p-2q+4r+(-6p)7r=? 8. 11m-6n-2+(-2m)-7n+8=?
9. 3p+2g+12r+4p-2g-7r=? 10.7x-2y+3z-(-5x)+4y-2z=?
11.(-2m)-7n+1-4m-2n-1=? 12.7p+8q-2r-(-3p)+7q-2r=?
13.b+c乘3=? 14.(-b)+c乘a=? 15.(-m)+n-p乘(-m)
化簡代數式
2007-08-28 9:20 pm
回答 (2)
2007-08-28 9:49 pm
1.3a+6+2a+8=?
=3a+2a+6+8
=5a+14
2.2m-4n+(-7m)+3n=?
=2m-4n-7m+3n
=2m-7m-4n+3n
= -5m-n
3.(-5a)-4b+(-2a)+2b=?
= -5a+4b-2a+2b
= -7a+6b
4. 4a+2b-3a-6b=?
=4a-3a+2b-6b
=a-4b
5. 3x-2y-2x+y=?
=3x-2x-2y+y
=x-y
6. 4b-3-2b+2=?
=4b-2b-3+2
=2b-1
7.唔識
8.11m-6n-2+(-2m)-7n+8=?
=11m-6n-2-2m-7n+8
=11m-2m-6n-7n-2+8
=9m-13n+6
9. 3p+2g+12r+4p-2g-7r=?
=3p+4p+2g-2g+12r-7r
=7p+5r
10.7x-2y+3z-(-5x)+4y-2z=?
=7x-2y+3z+5x-4y+2z
=7x+5x-2y-4y+3z+2z
=12x-6y+5z
11.(-2m)-7n+1-4m-2n-1=?
=-2m+7n-1+4m+2n+1
=2m+4m+7n+2n-1+1
=6m+9n
12.7p+8q-2r-(-3p)+7q-2r=?
=7p+8q-2r+3p-7q+2r
=7p+3p+8q-7q-2r+2r
=10p+q
13.b+c乘3=?
=3c+b
14.(-b)+c乘a=?
=ac-b
15.唔識
[答案應該係咁,,錯左唔好怪我>_<]
=3a+2a+6+8
=5a+14
2.2m-4n+(-7m)+3n=?
=2m-4n-7m+3n
=2m-7m-4n+3n
= -5m-n
3.(-5a)-4b+(-2a)+2b=?
= -5a+4b-2a+2b
= -7a+6b
4. 4a+2b-3a-6b=?
=4a-3a+2b-6b
=a-4b
5. 3x-2y-2x+y=?
=3x-2x-2y+y
=x-y
6. 4b-3-2b+2=?
=4b-2b-3+2
=2b-1
7.唔識
8.11m-6n-2+(-2m)-7n+8=?
=11m-6n-2-2m-7n+8
=11m-2m-6n-7n-2+8
=9m-13n+6
9. 3p+2g+12r+4p-2g-7r=?
=3p+4p+2g-2g+12r-7r
=7p+5r
10.7x-2y+3z-(-5x)+4y-2z=?
=7x-2y+3z+5x-4y+2z
=7x+5x-2y-4y+3z+2z
=12x-6y+5z
11.(-2m)-7n+1-4m-2n-1=?
=-2m+7n-1+4m+2n+1
=2m+4m+7n+2n-1+1
=6m+9n
12.7p+8q-2r-(-3p)+7q-2r=?
=7p+8q-2r+3p-7q+2r
=7p+3p+8q-7q-2r+2r
=10p+q
13.b+c乘3=?
=3c+b
14.(-b)+c乘a=?
=ac-b
15.唔識
[答案應該係咁,,錯左唔好怪我>_<]
參考: 自己做
2007-08-28 9:34 pm
1. 3a+6+2a+8=5a+14
2. 2m-4n+(-7m)+3n=2m-4n-7m+3n= -5m-n
3. (-5a)-4b+(-2a)+2b= -7a-2b
4. 4a+2b-3a-6b= a-4b
5. 3x-2y-2x+y=x-y
6. 4b-3-2b+2=2b-1
7. 3p-2q+4r+(-6p)7r ?? Is it something wrong??
8. 11m-6n-2+(-2m)-7n+8=9m-13n+6
9. 3p+2g+12r+4p-2g-7r=7p+5r
10.7x-2y+3z-(-5x)+4y-2z=12x+2y-z
11.(-2m)-7n+1-4m-2n-1= -6m-9n = -3(2m+3n)
12.7p+8q-2r-(-3p)+7q-2r=10p+15q-4r
13.b+c乘3=b+3c
14.(-b)+c乘a=ac-b
15.(-m)+n-p乘(-m) =(p-1)m+n
2. 2m-4n+(-7m)+3n=2m-4n-7m+3n= -5m-n
3. (-5a)-4b+(-2a)+2b= -7a-2b
4. 4a+2b-3a-6b= a-4b
5. 3x-2y-2x+y=x-y
6. 4b-3-2b+2=2b-1
7. 3p-2q+4r+(-6p)7r ?? Is it something wrong??
8. 11m-6n-2+(-2m)-7n+8=9m-13n+6
9. 3p+2g+12r+4p-2g-7r=7p+5r
10.7x-2y+3z-(-5x)+4y-2z=12x+2y-z
11.(-2m)-7n+1-4m-2n-1= -6m-9n = -3(2m+3n)
12.7p+8q-2r-(-3p)+7q-2r=10p+15q-4r
13.b+c乘3=b+3c
14.(-b)+c乘a=ac-b
15.(-m)+n-p乘(-m) =(p-1)m+n
收錄日期: 2021-04-23 21:30:29
原文連結 [永久失效]:
https://hk.answers.yahoo.com/question/index?qid=20070828000051KK02105