教下我等住救命
我有一題數學唔識,
唔該你地教教我,
係轉主項,寫埋步驟,
a(x+b)=b(x-a),則x=
千萬個唔該......
回答 (4)
✔ 最佳答案
a(x + b) = b(x - a)
ax + ab = bx - ab
ax - bx = -2ab
bx - ax = 2ab
(b - a)x = 2ab
x =2ab/(b - a)
=
a(x+b)=b(x-a)
ax+ab=-bx-ab
ab+ab=ax+bx
2ab=ab2x
2ab-ab=2x
ab =2x
ab/2=x
x=ab/2
參考: me
a(x + b) = b(x - a)
ax + ab = bx - ab
ax - bx = -2ab
bx - ax = 2ab
(b - a)x = 2ab
x =2ab/(b - a)
a(x b) = b(x-a)
ax ab = bx-ab
ax-bx = -ab-ab
x(a-b) = -2ab
x = -2ab/(a-b)
參考: 自己
收錄日期: 2021-04-23 23:06:03
原文連結 [永久失效]:
https://hk.answers.yahoo.com/question/index?qid=20081025000051KK02612
檢視 Wayback Machine 備份