Hi

I been given a question to explain how to solve a quartic equation by using Lagrange Resolvent and need to use it to solve this question x^{4}+3x^{3}+10x^{2}+20x+45. So I was wondering if anyone could explain it to me as I don't understand it very well from looking at websites such wikipedia.

So if anyone can explain it to me then it would be very much grateful