Answer:
I think we have to use commas in lists because if we didn't it would be all together and it would be more hard to read.
Step-by-step explanation:
I hope this helps
f(6) = 24
f(x) = x^2 - 2x
Let x = 6
f(6) = 6^2 - 2(6)
= 36 - 12
= 24
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