Answer:
4[(a- 4)(a+4)]
Step-by-step explanation:
4a^2 - 64
From the above, 4 is a common factor. The expression can be written as:
4[a^2 - 16]
16 can be written as 4^2
4[a^2 - 4^2]
Now, we have difference of two squares. This is written as:
4[(a- 4)(a+4)]
