I don't know how to do this question:

Given that alpha is a root of the equation x^2=2x-3 show that alpha^3=alpha-6.

I have a list of equations involving the roots calling them alpha and beta.

Printable View

- January 3rd 2010, 07:40 AMStuck ManQuadratics question
I don't know how to do this question:

Given that alpha is a root of the equation x^2=2x-3 show that alpha^3=alpha-6.

I have a list of equations involving the roots calling them alpha and beta. - January 3rd 2010, 07:57 AMGrandad
- January 3rd 2010, 08:12 AMStuck Man
I see, thanks.

Is there any particular topic that results such as this are in?:

a^2+b^2=(a+b)^2-2ab - January 3rd 2010, 08:26 AMGrandad