Posted by **Marcelle** on Wednesday, June 24, 2009 at 1:00pm.

How do i factorise 25p^2-q^2?

- Math -
**PsyDAG**, Wednesday, June 24, 2009 at 1:11pm
The middle term must cancel out in terms of the factors, so if one factor has a negative term, the other would have a positive term (-q and +q). You should be able to figure it out from that.

I hope this helps. Thanks for asking.

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