Maths Form 2
回答 (2)
2010-10-15 3:32 am
✔ 最佳答案
Factorize x(3x-y)^3-(y-3x)^2x(3x-y)^3-(y-3x)^2
= x(3x-y)^3 - (3x-y)^2
= [x(3x-y) - 1](3x-y)^2
= (3x^2 - xy - 1)(3x-y)^2
參考: Hope the solution can help you^^”
2010-10-18 2:16 am
Factorize x(3x-y)^3-(y-3x)^2
x(3x-y)^3-(y-3x)^2
=x(3x-y)(3x-y)(3x-y)-(y-3x)^2
=x(3x-y)(3x-y)(3x-y)+(3x-y)(3x-y)
=(3x-y)(x+1)
樓下個條唔對的!
2010-10-17 18:17:10 補充：
系樓上啊,唔好意思
x(3x-y)^3-(y-3x)^2
=x(3x-y)(3x-y)(3x-y)-(y-3x)^2
=x(3x-y)(3x-y)(3x-y)+(3x-y)(3x-y)
=(3x-y)(x+1)
樓下個條唔對的!
2010-10-17 18:17:10 補充：
系樓上啊,唔好意思
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https://hk.answers.yahoo.com/question/index?qid=20101014000051KK01052