Home > CCA2 > Chapter 5 > Lesson 5.2.1 > Problem5-66

5-66.

Factor each expression completely. Homework Help ✎

1. $x^2−49$

Notice that this is the difference of squares.

2. $6x^2+48x$

There are only 2 terms, so factor out the greatest common factor.

3. $x^2−x−72$

Find two numbers that multiply to $−72$ and add to $−1$.

4. $2x^3−8x$

Factor out the greatest common factor first, then see part (a).

$2x(x+2)(x−2)$