Question 2 (vii) - Algebra Identities and Formulas - Chapter 8 Class 8 Algebraic Expressions and Identities

Last updated at Dec. 16, 2024 by Teachoo

Ex 9.5, 2 - Chapter 9 Class 8 Algebraic Expressions and Identities - Part 7

Next: Question 3 (i) → Share on WhatsApp

Transcript

Question 2 Use the identity (𝑥+𝑎)(𝑥+𝑏)=𝑥^2+(𝑎+𝑏)𝑥+𝑎𝑏 to find the following products. (vii) (𝑥𝑦𝑧−4) (𝑥𝑦𝑧−2) (𝑥𝑦𝑧−4) (𝑥𝑦𝑧−2) = (𝑥𝑦𝑧+(−4)) (𝑥𝑦𝑧+(−2)) (𝑡+𝑎)(𝑡+𝑏)=𝑡^2+(𝑎+𝑏)𝑡+𝑎𝑏 Putting 𝑡 = 𝑥𝑦𝑧 , 𝑎 = −4 & 𝑏 = −2 = (𝑏)^2+(7)^2−2(𝑏)(7) = 𝑏^2+49−(2×7)×𝑏 = 𝒃^𝟐+𝟒𝟗−𝟏𝟒𝒃

Made by

Davneet Singh

Davneet Singh has done his B.Tech from Indian Institute of Technology, Kanpur. He has been teaching from the past 14 years. He provides courses for Maths, Science and Computer Science at Teachoo

Class 6

Class 7

Class 8

Class 9

Class 10

Class 11

Class 12

Courses

Interesting

Popular