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**c** on
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I am having trouble finding the greatest common factor when there is a variable. I have these two problems I need help with.

1. what is the GCF of 7x^2 and 14x^3

2. what is the GCF of 4x^5 and 6x^7

The exponents are throwing me off.

http://www.math.com/school/subject1/lessons/S1U3L2GL.html

The first is 7x^2 ...it divides into each.