Question

How are roots being cancelled in these cases...what are the basics of cancelling roots in all kind if operations?!
Properties of roots (in all operations)?!

Answer 1

When there is a power of 2 inside a root (✓) then we put modulus.

If you are in 10th class or below, you can simply cut the root and the power.

Root means 1/2 power and square = 2 power.

In the expression, powers are multiplied, thus 2 x 1/2 = 1.
and the expression becomes simple.

But from class 11 onwards, modulus is put and three cases are formed.