When I evaluted the following questions,I found a problem and I don't know how to arrange the order.
(24xy-5x)-(13xy-4x)
=24xy-5x-13xy+4x
=-x+11xy(this is my wrong answer,the correct one is 11xy-x)
(4xy-7y+2xz)+(3xz-2xy+5y)
=+2xy+5xz-2y(my wrong answer,the correct one is2xy-2y+5xz)
HELP!!!!!!!!!!!!!!
F.2 Maths(arrange the order of polynomial)
2008-10-01 5:20 am
回答 (2)
2008-10-01 5:39 am
✔ 最佳答案
(24xy-5x)-(13xy-4x)=24xy-5x-13xy+4x
=24xy-13xy-5x+4x
=11xy-x
(4xy-7y+2xz)+(3xz-2xy+5y)
=4xy-7y+2xz+3xz-2xy+5y
=4xy-2xy-7y+5y+2xz+3xz
=2xy-2y+5xz
ok??
2008-10-01 6:09 am
其實只不過係排位問題,答案冇錯!!
11xy-x=-x+11xy,
2xy-2y+5xz=+2xy+5xz-2y
11xy-x=-x+11xy,
2xy-2y+5xz=+2xy+5xz-2y
收錄日期: 2021-04-15 22:56:21
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