Hey guys

I'm stuck on this polynomial problem, i think its pretty simple though I just cant do it lol, basically trying to factorise so that there is no surd left

Heres the question:

If are the roots of , form the equation whose roots are:

So this is what I did

Let

substituting into equation

yea this i where I've tried to manipulate the equation so to obtain a polynomial with whole number powers...but I haven't been able to do it.. looks simple enough

Thanks for your help