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"Squared" means that something is multiplied by itself. For instance, 5 squared means the same as 5 times 5.
mc squared.
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.
Times itself. For example, 4 squared would be 4x4 = 16. 5 squared would be 5x5 = 25 etc
a quantity multiplied by itself