Question

Factor this expression completely Place factors alphabetically
mn - 4m - 5n + 20

Answer 1

When factoring, you want to pull out the terms that you see are common among more than one full term

Answer 2

In this case, what can you say is a factor of more than one term here?

Answer 3

m

Answer 4

or n

Answer 5

Yes those are correct, now try pulling them out and setting up a distribution among the terms they were a part of. For example, 5n + 10mn = 5n(1 + 2m)