Hello

2 is a root of so

In , we substitute and get : 2 is also a root of

The first polynomial is cubic, the second quadratic so there exists such thatProblem 154.Assume that (where a and b are some numbers) is divisible by . Find a and b.

Then, you can develop the RHS and identify the coefficients of the two polynomials which yields 4 equations with 4 unknowns.