求下列各題的最簡代數式:
1.2x+5+4x=__________________________________
2.8A-A+3A=_____________________________________
3.3+2B-B+6=_________________________________
4.8-3y-8+6y=___________________________________
40分！急!急!急!
2007-03-05 5:44 am
回答 (6)
2007-03-05 5:47 am
✔ 最佳答案
(1)2x+5+4x
=2x+4x+5 (collecting like terms)
=6x+5
(2)
8A-A+3A
=7A+3A
=10A
(3)
3+2B-B+6
=3+6+2B-B (collecting like terms)
=9+B
(4)
8-3y-8+6y
=8-8-3y+6y (collecting like terms)
=6y-3y
=3y
2007-03-06 6:54 am
1. 2X+5+4X
=2X+4X+5
=6X+5
2. 8A-A+3A
=7A+3A
=10A
3. 3+2B-B+6
=3+6+2B-B
=9+B
4. 8-3y-8+6y
=8-8-3y+6y
=3y
其實呢ｄ數好容易
=2X+4X+5
=6X+5
2. 8A-A+3A
=7A+3A
=10A
3. 3+2B-B+6
=3+6+2B-B
=9+B
4. 8-3y-8+6y
=8-8-3y+6y
=3y
其實呢ｄ數好容易
參考: 自己
2007-03-06 12:04 am
2x+5+4x=(2+4)x+5=6x+5
8A-A+3A=(8-1+3)A=10A
3+2B-B+6=(2B-B)+3+6=B+9
8-3y-8+6y=8-8+6y-3y=3y
8A-A+3A=(8-1+3)A=10A
3+2B-B+6=(2B-B)+3+6=B+9
8-3y-8+6y=8-8+6y-3y=3y
2007-03-05 6:31 am
1. 2x+5+4x = 2x+4x+5 = (2+4)x + 5 = 6x+5
2. 8A-A+3A = (8-1+3)A = 10A
3. 3+2B-B+6 = 3+6+2B-B = 9+(2-1)B = 9+B
4. 8-3y-8+6y = 8-8+6y-3y = 0 + (6-3)y = 3y
2. 8A-A+3A = (8-1+3)A = 10A
3. 3+2B-B+6 = 3+6+2B-B = 9+(2-1)B = 9+B
4. 8-3y-8+6y = 8-8+6y-3y = 0 + (6-3)y = 3y
2007-03-05 6:29 am
1.2x+5+4x
=6x+5
2.8A-A+3A
=10A
3.3+2B-B+6
=B+9
4.8-3y-8+6y
=3y
=6x+5
2.8A-A+3A
=10A
3.3+2B-B+6
=B+9
4.8-3y-8+6y
=3y
參考: my calculation
2007-03-05 6:07 am
1. 2x+5+4x = 6x+5
2. 8A-A+3A = 10A
3. 3+2B-B+6 = B+9
4. 8-3y-8+6y = 3y
2. 8A-A+3A = 10A
3. 3+2B-B+6 = B+9
4. 8-3y-8+6y = 3y
參考: own*
收錄日期: 2021-04-23 00:16:57
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https://hk.answers.yahoo.com/question/index?qid=20070304000051KK05373