Question

How to find the roots of four degree equation if two of its roots are given?

Answer 1

Answer:

Let p(x) be the equation having degree 4 and let a and b are given roots then (x-a)and (x-b) will be two of the factors of P(x) .

Divide p(x) by (x-a)(x-b) , you will get a quadratic equations whose roots can be find out easily.