This Is a Certified Answer

Certified answers contain reliable, trustworthy information vouched for by a hand-picked team of experts. Brainly has millions of high quality answers, all of them carefully moderated by our most trusted community members, but certified answers are the finest of the finest.
2. you can delete answers. only if u r a moderator.

1.  I am enclosing a solution and generic methods of solving the cubic equation.  I had solved this earlier in another question..  I had given the general solution also.  I am unable to find that one.. But the attached doc. will be good.