$$mc^2.$$ is called an expression. Correct me if I'm wrong. I'd like to see this expression as $$m * c^2.$$ Here, one of the expression's factors is $m$. Is there a general name for the factors of an expression, or can I just call them however I like?
closed as unclear what you're asking by rschwieb, Pedro Tamaroff, Ｊ. Ｍ., user86418, Lost1 Feb 28 at 0:17
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m is a multiplier of c^2 and c^2 is a multiplier of m. So generally speaking m and c^2 are multipliers, because its a product these two variables are called factors.
By expression I guess you mean the whole equation and not only c^2!