Question

find tha square by usinv duplex method​

Answer 1

Answer:

In other words, from the outside working inwards, take the outermost digits, multiply them, double them, then take the next adjoining digits, multiply then, double them, then the next digits. etc. If you are left with one single middle digit, square it.

Answer 2

From the outside working inwards, take the outermost digits, multiply them, double them, then take the next adjoining digits, multiply then, double them, then the next digits. etc. If you are left with one single middle digit, square it.