Question

Factor the expression 4r^2 - 64

Answer 1

4(r+4)(r-4)

Explanation:

If you factor it out, then it will be 4(r+4)(r-4). You can double check by multiplying it.

Answer 2

For this case we must factor the following expression:

`4r ^ 2-64`

We take common factor 4:

`4 (r ^ 2-16)`

We factor the expression within the parenthesis:

`4 [(r-4) (r + 4)]`

Finally we have that the factored expression is:

`4 [(r-4) (r + 4)]`

Answer:

`4 [(r-4) (r + 4)]`