How to Find Square of the Numbers via a short trick

Example-1

Let the Number is 45.

(45)²=45x45

first of all multiply ones place number 

5x5=25

then

multiply tens place number with increase 1 in any of the number

4x(4+1)=20

and place it like this

(45)²=2025

Example-2

(35)²

35x35

5x5=25

3x(3+1)=12

(35)²=1225

This method is applicable only when tens place numbers are same and ones place number is 5.