FP1 Roots of polynomials- HELP!!

I’m stuck on part ii). So for i) I substituted x+2 in to get the cubic 2x^3 +12u^2 +27u+25=0. Is this right?
For ii) I thought that I should do sum of pairs of Roots/ product of Roots but I’m not sure. Anyone able to help?

you still have an x term...

I’m stuck on part ii). So for i) I substituted x+2 in to get the cubic 2u^3 +12u^2 +27u+25=0. Is this right?
For ii) I thought that I should do sum of pairs of Roots/ product of Roots but I’m not sure. Anyone able to help?

I’m stuck on part ii). So for i) I substituted x+2 in to get the cubic 2x^3 +12u^2 +27u+25=0. Is this right?
For ii) I thought that I should do sum of pairs of Roots/ product of Roots but I’m not sure. Anyone able to help?

Yes your cubic is correct.

For (ii), do $\dfrac{\alpha \beta + \beta \alpha + \alpha \gamma}{\alpha \beta \gamma}= \dfrac{\sum \alpha \beta}{\alpha \beta \gamma}$

Thanks! Sorry to be a pain but I’m having a hard time deciphering that into what I’ve literally got to do. Any way you could write it out and post a pic so it makes sense to me (I understand it’s hard to type out maths)

Thanks! Sorry to be a pain but I’m having a hard time deciphering that into what I’ve literally got to do. Any way you could write it out and post a pic so it makes sense to me (I understand it’s hard to type out maths)

If the roots of a cubic $ax^3+bx^2+cx+d=0$ are $a, b, c$

hence read off their values from your quadratic.

Erm... might want to rephrase this.

Thanks! You too