### Home > A2C > Chapter 12 > Lesson 12.1.1 > Problem12-24

12-24.

Factor each of the following expressions completely.

1. $24x^{2} − 14x − 20$

Start by factoring out 2.

Guess and use a generic rectangle to check other factors.

1. $16x^{4} − 1$

Notice that this is a difference of squares:

$\left(4x^{2}\right)^{2} − \left(1\right)^{2}$