Squaring numbers-The better way!! contd..

This article is an extension to our fist article: ‘Squaring numbers-The better way!!’ We will demonstrate how to calculate squares using the simple identity-

(a+b)²=a²+2ab+b²

This method is useful as it helps to break up the number into a multiple of 10 whose square is pretty use to find.

Eg. (76)²= (70+6)²=70²+2(70)(6)+6²=4900+840+36=5776

By splitting 76 into 70 and 6, we were able to calculate its square quickly, by simply using the identity.