Thread: Roots of Cubic

Hi , I don't know what's going on here with the sigma notation (attached question and answer) .
A simplified explanation would be greatly appreciated .

Thank you

There are a many sigmas/ Which one are you referring to?

Hi , alpha=2 the first one and then why gamma is omitted in the second .

Originally Posted by minicooper58

Hi , I don't know what's going on here with the sigma notation (attached question and answer) .
A simplified explanation would be greatly appreciated .

The cubic is

The sum of the roots;

The product of roots two at a time:

The products of the roots: