1. c= 2a+3b, make b the subject of formula.
2. If a:b=2:1 and b:c +2:5, then a:b:c = ?
3. Factorize a^3 -8
4. Expand ( x-4 ) ( 2x^2+ 1)
Maths
2008-08-03 11:02 pm
回答 (1)
2008-08-03 11:45 pm
✔ 最佳答案
1. c= 2a+3bc-2a=3b
(c-2a)/3=b
b=(c-2a)/3
2. a:b:c = 4:2:5
3. a^3 -8
= a^3-2^3
=(a+2)(a-2)
4.( x-4 ) ( 2x^2+ 1)
=2x^3+x-8x-4
=2x^3-7x-4
Hope I can help you!!
2008-08-03 15:47:32 補充：
^ 唔係應該代表次方咩??
參考: by myself
收錄日期: 2021-04-24 08:27:21
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