s2 means s multiplied by itself.
s is a variable which we may or may not know the value of.
E.g. if s = 4 then s2 = 4 x 4 = 16
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Squared, not squard, means multiplied by itself. The reason is that the area of a square, with sides of length, s is s*s: the side length multiplied by itself. So, for example, 3.5 squared = 3.5*3.5 = 12.25 3.5 squared can also be written as 3.52.
you mean c? haha pythagoras
ms^-2 or m/s^2 is a unit used to measure acceleration.
You cannot "solve" a mean squared deviation". You can calculate it or use it, but there is nothing to solve!
Multiply the no. by itself. Ex 5 squared is 25.