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Example 7 - Factorise a^2 - 2ab + b^2 - c^2 - Chapter 14 Class 9 NCERT


Transcript

Example 7 Factorise π‘Ž^2 – 2ab + 𝑏^2 – 𝑐^2 π‘Ž^2 – 2ab + 𝑏^2 – 𝑐^2 = 𝒂^𝟐+𝒃^πŸβˆ’πŸπ’‚π’ƒβˆ’π‘^2 Using (π‘Žβˆ’π‘)^2 = π‘Ž^2+𝑏^2βˆ’2π‘Žπ‘ = (π‘Žβˆ’π‘)^2 βˆ’π‘^2 Using π‘₯^2βˆ’π‘¦^2=(π‘₯+𝑦)(π‘₯βˆ’π‘¦) Here π‘₯=(π‘Žβˆ’π‘), y = c = ((π‘Žβˆ’π‘)+𝑐) ((π‘Žβˆ’π‘)βˆ’π‘) = (π’‚βˆ’π’ƒ+𝒄) (π’‚βˆ’π’ƒβˆ’π’„)

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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.