Work Step by Step
In the trinomial x$^2$-x-20, b=-1 and c=-20. The set of factors of c whose sum is equal to b are -5 and 4. Therefore the factorization is: (x-5)(x+4)
You can help us out by revising, improving and updating this answer.Update this answer
After you claim an answer you’ll have 24 hours to send in a draft. An editor will review the submission and either publish your submission or provide feedback.