1.(a+2b)+(a-3b-c)
2.(3x+y)-(2x-2y-3z)
3.(6p+4q)_(5q-4r)
4.(5x+7y-(8x-6y-3z)
要有過程
有數學唔識做？？
2007-05-29 7:03 am
回答 (4)
2007-05-29 7:13 am
1. a+2b+a-3b-c
a+a+2b-3b-c
2a-b-c
2. 3x+y-2x+2y+3z
3x-2x+y+2y+3z
x+3y+3z
3. 6p+4q-5q+4r
6p-q+4r
4. 5x+7y-8x+6y+3z
5x-8x+7y+6y+3z
-3x+13y+3z
3x-13y-3z
a+a+2b-3b-c
2a-b-c
2. 3x+y-2x+2y+3z
3x-2x+y+2y+3z
x+3y+3z
3. 6p+4q-5q+4r
6p-q+4r
4. 5x+7y-8x+6y+3z
5x-8x+7y+6y+3z
-3x+13y+3z
3x-13y-3z
參考: ME!
2007-05-29 7:13 am
1.(a+2b)+(a-3b-c)
=a+2b+a-3b-c
=2a-b-c
2.(3x+y)-(2x-2y-3z)
=3x+y-2x+2y+3z
=x+3y+3z
3.(6p+4q)_(5q-4r)
=6p+4q-5q+4r
=6p-q+4r
4.(5x+7y-(8x-6y-3z)
=5x+7y-8x+6y+3z
=-3x+13y+3z
=a+2b+a-3b-c
=2a-b-c
2.(3x+y)-(2x-2y-3z)
=3x+y-2x+2y+3z
=x+3y+3z
3.(6p+4q)_(5q-4r)
=6p+4q-5q+4r
=6p-q+4r
4.(5x+7y-(8x-6y-3z)
=5x+7y-8x+6y+3z
=-3x+13y+3z
參考: me
2007-05-29 7:12 am
1.(a+2b)+(a-3b-c)
=a+2b+a-3b-c
=2a-b-c//
2.(3x+y)-(2x-2y-3z)
=3x+y-2x+2y+3z
=x+3y+3z//
3.(6p+4q)-(5q-4r)
=6p+4q-5q+4r
=6p-q+4r//
4.(5x+7y-(8x-6y-3z)
=5x+7y-8x+6y+3z
=-3x+13y+3z//
=a+2b+a-3b-c
=2a-b-c//
2.(3x+y)-(2x-2y-3z)
=3x+y-2x+2y+3z
=x+3y+3z//
3.(6p+4q)-(5q-4r)
=6p+4q-5q+4r
=6p-q+4r//
4.(5x+7y-(8x-6y-3z)
=5x+7y-8x+6y+3z
=-3x+13y+3z//
參考: me
2007-05-29 7:12 am
㊣hope help到你~
可以既,
揀我做最佳ans,thx~
1.(a+2b)+(a-3b-c)
=a+2b+a-3b-c
=2a-b-c
2.(3x+y)-(2x-2y-3z)
=3x+y-2x+2y+3z
=x+3y+3z
3.(6p+4q)-(5q-4r)
=6p+4q-5q+4r
=10r-q
4.(5x+7y)-(8x-6y-3z)
=5x+7y-8x+6y+3z
= -3x+13y+3z
2007-05-28 23:13:03 補充：
sor....3.(6p 4q)-(5q-4r)=6p 4q-5q 4r=6p-q 4r
2007-05-28 23:13:39 補充：
me
可以既,
揀我做最佳ans,thx~
1.(a+2b)+(a-3b-c)
=a+2b+a-3b-c
=2a-b-c
2.(3x+y)-(2x-2y-3z)
=3x+y-2x+2y+3z
=x+3y+3z
3.(6p+4q)-(5q-4r)
=6p+4q-5q+4r
=10r-q
4.(5x+7y)-(8x-6y-3z)
=5x+7y-8x+6y+3z
= -3x+13y+3z
2007-05-28 23:13:03 補充：
sor....3.(6p 4q)-(5q-4r)=6p 4q-5q 4r=6p-q 4r
2007-05-28 23:13:39 補充：
me
收錄日期: 2021-05-01 00:15:44
原文連結 [永久失效]:
https://hk.answers.yahoo.com/question/index?qid=20070528000051KK04979