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SaFrauya

Guest

Roots of Polynomial Equations: Proof Question and Misc Question

Hello, I'm a little stuck on this question...

The cubic equation

has roots

.

i) Write down the values of

and

, and express k in terms of

ii) Show that

rambow

Member

Registered: 2009-01-09

Posts: 3

Re: Roots of Polynomial Equations: Proof Question and Misc Question

Hello, I'm a little stuck on this question...

The cubic equation

has roots

.

i) Write down the values of

and

, and express k in terms of

ii) Show that

ok,I will answer you the i).
and you will find the ii) is the same via same thought.

we can get following equation because

are the roots of the equation

so

,
   

   

from this we can know

but i don't know what is the 'k' mean
so i can't express k

hope this will help
sorry If I didn't explain that clearly .
I'm not good at write in English at all,and I think I need more practice.

Last edited by rambow (2009-01-09 08:56:50)