In most case you must multiply the number by itself.
When the number is irrational ( meaning it cannot be expressed as a fraction,) you may end up with a one that is rational ( can be expressed as a fraction).
For example, the 2 squared is 2x2=4
square root of 2 is irrational but square root of 2 times itself is 2.
Pi is an irrational number but PixPi is Pi2 which is still irrational.
Even complex numbers can be squared by multiplying the number by itself.
So a+bi is a complex number and (a+bi)2 =(a+bi)(a=bi) where i is the square root of -1.
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Multiply the number by 1/3 or Divide the number by 3
Yes, that is correct. It is one of the basic properties of surds, and is used in many identities and some equations, to simplify and calulate and prove.
Multiply the number by itself.
non perfect square is that it cannot be divided by any of the number . It is divided by only itself and one
a number can only be square if it has a square root.