Respuesta :

I like prime factorization for finding the GCF:
[tex]21x^3=3^.7^.x^.x^.x[/tex]
[tex]14x^2=2^.7^.x^.x[/tex]
[tex]35x=5^.7^.x[/tex]

What common things can you pull from each term...It must be the same amount from each?
7x