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Question: subs versus eval: same or not?

Question:subs versus eval: same or not?

mmcdara 4540 Maple
eval substitution subs
March 27 2019
2

Hi, 

In two lines below Command1 and Command2 have the same value

Command1 := subs([a=1, b=2], a*x+b);
Command2 := eval(a*x+b, [a=1, b=2]);

Are there pros and cons of using one over the other?

Thanks in advance
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