Thread: Factorising 2

Factorise the following as fully as possible.

-x^5 - x^4 + 21x^3 + 49x^2 - 8x - 60

Originally Posted by Mr Rayon

Factorise the following as fully as possible.

-x^5 - x^4 + 21x^3 + 49x^2 - 8x - 60

Use the same methods for this exercise as were explained for this similar exercise.

If you get stuck, please reply showing all of your steps and reasoning so far. Thank you!

Hello,

Originally Posted by Mr Rayon

Factorise the following as fully as possible.

-x^5 - x^4 + 21x^3 + 49x^2 - 8x - 60

You can see that the sum of the coefficients is 0.
Therefore, 1 is a root of this polynomial.

Then apply a known method like the rational roots test !