Ex 8.4, 3 (viii) - Chapter 8 Class 8 Algebraic Expressions and Identities

Last updated at August 13, 2026 by

Ex 8.4, 3 (viii) - Simplify (a + b + c)(a + b - c) - Chapter 9 Class 8 - Ex 8.4

Remove Ads
Teachoo ยท Class 8 Explore Class 8

Transcript

Ex 8.4, 3 Simplify. (viii) (๐‘Ž+๐‘+๐‘)(๐‘Ž+๐‘โˆ’๐‘) (๐‘Ž+๐‘+๐‘)(๐‘Ž+๐‘โˆ’๐‘) = ๐‘Ž(๐‘Ž+๐‘โˆ’๐‘)+๐‘(๐‘Ž+๐‘โˆ’๐‘)+๐‘(๐‘Ž+๐‘โˆ’๐‘) = (๐’‚ ร— ๐’‚)+(๐’‚ ร— ๐’ƒ)โˆ’(๐’‚ ร— ๐’„)+(๐’ƒ ร— ๐’‚)+(๐’ƒ ร— ๐’ƒ)โˆ’(๐’ƒ ร— ๐’„) + (๐’„ ร— ๐’‚)+(๐’„ ร— ๐’ƒ)โˆ’(๐’„ ร— ๐’„) = ๐‘Ž^2+๐‘Ž๐‘โˆ’๐‘Ž๐‘+๐‘๐‘Ž+๐‘^2โˆ’๐‘๐‘+๐‘๐‘Ž+๐‘๐‘โˆ’๐‘^2 = ๐‘Ž^2+๐‘Ž๐‘โˆ’๐‘Ž๐‘+๐‘Ž๐‘+๐‘^2โˆ’๐‘๐‘+๐‘Ž๐‘+๐‘๐‘โˆ’๐‘^2 = ๐‘Ž^2+๐‘^2โˆ’๐‘^2+๐‘Ž๐‘+๐‘Ž๐‘โˆ’๐‘๐‘+๐‘๐‘โˆ’๐‘Ž๐‘+๐‘Ž๐‘ = ๐’‚^๐Ÿ+๐’ƒ^๐Ÿโˆ’๐’„^๐Ÿ+๐Ÿ๐’‚๐’ƒ

Davneet Singh's photo - Co-founder, Teachoo

Made by

Davneet Singh

Davneet Singh is an IIT Kanpur graduate and has been teaching for 16+ years. At Teachoo, he breaks down Maths, Science and Computer Science into simple steps so students understand concepts deeply and score with confidence.

Many students prefer Teachoo Black for a smooth, ad-free learning experience.