Squaring Of Numbers Without Multiplication|Column Method|Diagonal Method

Multiplication by short cut methods

Method of cross multiplication

Method of multiplication of two determinants

Find the square of 87 by using column method and diagonal method.

Find the square of the following numbers without actual multiplication.(i) 39 (ii) 42

Discussion OF ex-3.4,|| Cross-multiplication method || Short method to remembering cross-multiplication method by Determinant || Example-14,15