SOLUTION: Fator the following biomial. 25x^2 - 81y^2. I'm not sure how to solve this. I'm just alittle confused on how to do it. Thank you for the help.

Question 101336: Fator the following biomial.
25x^2 - 81y^2.

I'm not sure how to solve this. I'm just alittle confused on how to do it.
Thank you for the help.
Answer by Earlsdon(6294) (Show Source): You can put this solution on YOUR website!
Factor:
Do you see that this binomial is the difference of two squares?

The difference of two squares can be factored thus:
Applying this to your problem, we get:
=
You can confirm this by using the FOIL method to multiply the resultant factors:
The two middle terms drop out to leave you with: