Posted by **Rachelle** on Monday, November 10, 2008 at 5:14pm.

Thanks for those who answered my previous question! I have just one more: x^2-625=0, what is the GCF? How is it deterimined? It does not appear to me that there is one. How would it then be factored and have the zero-product powers applied?

Then, what about 120x^2-34x-21=0 (The same procedures as the one above) Thank you so much again.

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