1. rewrite the expression. use an exponent, rather than repeated multiplication. (–4)(–4)

You can solve this exercise and rewrite the expression given in the problem above by using an exponent, by applying the proccedure shown below:

 1. You have the expression:

 (-4)(-4)

 2. When you multiply, you obtain:

 (-4)(-4)=16

 3. You can write 16 as below:

 16=4²

 4. Therefore, the answer is: 4²