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Ex 14.2, 4 (i) - Factorise a^4 - b^4  - Chapter 14 Class 8 NCERT


Transcript

Ex 14.2, 4 Factorise. (i) 𝑎^4 – 𝑏^4 𝑎^4 – 𝑏^4 = (𝑎^2 )^2 − (𝑏^2 )^2 Using 𝑥^2 − 𝑦^2 = (x + y) (x − y) Here 𝑥=𝑎^2 and y = 𝑏^2 = (𝑎^2+𝑏^2 ) (𝑎^2 − b^2) Using 𝑥^2 − 𝑦^2 = (x + y) (x − y) Here 𝑥=𝑎 and y = 𝑏 = (𝑎^2+𝑏^2 ) (𝑎+𝑏) (𝑎 − b) = (𝒂 − 𝒃) (𝒂+𝒃) (𝒂^𝟐− 𝒃^𝟐)

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Davneet Singh is a graduate from Indian Institute of Technology, Kanpur. He has been teaching from the past 12 years. He provides courses for Maths and Science at Teachoo.