I get
so
Stuck on a further pure question, asked one of my maths teachers today but she hadn't done most of the paper in 20 years.
Here's the question:
Given that the roots of the cubic equation
are determine the cubic equation with roots
All I have so far is
I assume the new equations will looks like:
I'm pretty sure the coefficient of the term will be which equals 3.
And for the constants:
I think I'm correct so far (may be some typos though), but I don't know how to get the x term.
Thanks.
edit
I got it, just factoring the coefficients of the x term:
brain ache now.