(x^3+2x-1)+(x^2-x-1)

2007-10-29 12:33 am
(x^3+2x-1)+(x^2-x-1)點樣簡化,我唔記得左,唔該

回答 (2)

2007-10-29 1:02 am
✔ 最佳答案
(x^3+2x-1)+(x^2-x-1)
=x^3+2x-1+x^2-x-1
=x^3+x^2+2x-x-1-1
=x^3+x^2+x-2



所以個answer系 x^3+x^2+x-1
參考: myself
2007-10-29 2:47 am
(x^3+2x-1)+(x^2-x-1)
=x^3+2x-1+x^2-x-1
=x^3+x^2+2x-x-1-1
=x^3+x^2+x-2
=x^3+(x-2)(x+1)
只可以簡化到e到..
之後係唔可以再簡化...


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