1. The document discusses algebraic identities for expressions of the form (a + b)2, (a - b)2, and (a + b)(a - b). It derives the identities (a + b)2 = a2 + 2ab + b2, (a - b)2 = a2 - 2ab + b2, and (a + b)(a - b) = a2 - b2.
2. Examples are provided to demonstrate expanding expressions and simplifying them using the derived identities. Specific examples include finding the value of (17)2, (20 - 3)2, and (17 × 23).
3. Practice problems are given involving expanding expressions
An intelligent way of squaring numbers using an algebraic identity given by ancient Indian mathematician Bhaskaracharya-II (1114-1193 CE). Learn this technique to do squaring mentally.
Teachers can use this technique to teach mental squaring.