SOLUTION: What are the factores of this equation. I think I know the answer but I want to make sure I am doing this right. 4b^2 -16

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Question 273052: What are the factores of this equation. I think I know the answer but I want to make sure I am doing this right.
4b^2 -16
Answer by Edwin McCravy(20055) About Me  (Show Source):
You can put this solution on YOUR website!

4b%5E2+-16

First factor out 4

4%28b%5E2-4%29

In the parentheses is the difference of two squares.
That's a special type of factoring. Have you learned how
to factor the difference of two squares? 

4%28b%5E2-2%5E2%29

4%28b-2%29%28b%2B2%29

Edwin