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What is the greatest common factor of $(a^2 - 9)$ and $(3a^2 - 3a)$?

 Sep 23, 2023
 #1
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It should be 3a notice that you can open (a^2-9) into a (a + 3 ) x (a - 3 ) and (3a^2-3a) into 3a ( a - 1 ) 

 

It should be much easier to recognize the gcf in both equations once you open them upsmiley

 Sep 23, 2023

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