Question

How do you simplify the expression `3cos^2x-4cosx-4`?

Answer 1

`=(3cosx + 2)(cosx - 2)`

Explanation:

You can factor:

`3cos^2x - 4cosx - 4 = 3cos^2x - 6cosx + 2cosx - 4`

`=3cosx(cosx - 2) + 2(cosx - 1)`

`=(3cosx + 2)(cosx - 2)`

Hopefully this helps!