GFC (greatest common factor for polynomials)

[Charlene]

Having problems with GCF

1) 4x^2 + 36y^2

2) 3x^2 - 12x + 5x - 20

3) 9x^2 - 16y^2

4) 3x^2 - 2x - 8

5) 13x^2 + 12x + 12

Thanks for your help.

 

[stapel]

Please reply showing your complete factorizations of each of the terms of the polynomials, and specify where you are stuck.

Thank you.

Eliz.