查看完整版本: F3 maths....plz=]

F3 maths....plz=]

factorize x^3-37x-84

唔好意思,我已把F3 數學忘記了

[quote]Originally posted by [i]krissssty[/i] at 2006-1-1 15:02:
factorize x^3-37x-84 [/quote]

I don't think you can do too much about this. All I can think of is

x(x^2-37)-84

同意上面gei 講法...
呢條唔似f.3 gei maths..
form2都有!~

[quote]原帖由 [i]wanlovemickey[/i] 於 2006-1-28 18:01 發表
同意上面gei 講法...
呢條唔似f.3 gei maths..
form2都有!~ [/quote]

再agree~......form 3 d野好似冇咁淺~

設f(x)=x^3-37x-84
f(7)=7^3-37(7)-84=0
so, (x-7)是其中一個因式.
x^3-37x-84=(x-7)(x^2+7x+12)
                   =(x-7)(x+3)(x+4)

[quote]原帖由 [i]sugarman[/i] 於 2006-1-29 01:48 發表
設f(x)=x^3-37x-84
f(7)=7^3-37(7)-84=0
so, (x-7)是其中一個因式.
x^3-37x-84=(x-7)(x^2+7x+12)
                   =(x-7)(x+3)(x+4) [/quote]
我都係用呢個方法
中學出得既三次方試多幾次一定中:)

use synthetic division
um...it's very hard to show u here...i u want to learn add me la
my msn is [email]carmanlo_doraemon@hotmail.com[/email]