(adsbygoogle = window.adsbygoogle || []).push({}); 1. The problem statement, all variables and given/known data

2. Relevant equations

3. The attempt at a solution

If I see an expression like

[tex]\sqrt{E^2c^2}[/tex]

I can just remove the square root sign right and replace it with Ec?

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# Homework Help: A very quick stupid question about square roots of squares

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