若a = +3, b = -3, 且c = -5
(ab+bc-2ac)/(+5-(-6)+a) - ab/c = ?
算了幾次最後出來的數字都很大
總覺得有哪裡算錯了
PS..在WORD打出來的公式直接貼過來完成變了個樣
初中分數求解
2012-08-19 10:49 pm
回答 (4)
2012-08-20 12:29 am
✔ 最佳答案
若a =+3，b =－3，且c =－5(ab+bc－2ac)/(+5－(－6)+a)－ab/c = ?
Sol
(ab+bc－2ac)/(+5－(－6)+a)－ab/c
=(ab+bc－2ac)/(+5+6+a)－ab/c
=(－9+15+30)/14+9/(－5)
=36/14－9/5
=18/7－9/5
=(90－63)/35
=27/35
2012-08-20 11:41 am
(ab+bc-2ac)/(+5-(-6)+a) - ab/c
=[3*(-3)+(-3)(-5)-2(3)(-5)]/(11+3)-[3*(-3)/-5]
=36/14-9/5
=27/35
=[3*(-3)+(-3)(-5)-2(3)(-5)]/(11+3)-[3*(-3)/-5]
=36/14-9/5
=27/35
2012-08-20 12:32 am
(-9+15+30)/14 -(-9/-5)
=36/14 -9/5
=180/70-126/70
=54/70
=27/35 //
=36/14 -9/5
=180/70-126/70
=54/70
=27/35 //
收錄日期: 2021-04-16 14:52:40
原文連結 [永久失效]:
https://hk.answers.yahoo.com/question/index?qid=20120819000051KK00307