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Ex 14.2, 1 (vii) - Factorise (l + m)^2 - 4lm (Hint: Expand (l+m)^2

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Ex 14.2, 1 Factorise the following expressions. (vii) 〖"(l + m)" 〗^2 – 4lm (Hint: Expand 〖"(l + m)" 〗^2 first) 〖"(l + m)" 〗^2 – 4lm Using (𝑎+𝑏^2 )=𝑎^2+𝑏^2+2𝑎𝑏 Here, 𝑎 = l and b = m Using (𝑎+𝑏^2 )=𝑎^2+𝑏^2+2𝑎𝑏 Here, 𝑎 = l and b = m Using (𝑎−𝑏^2 )=𝑎^2+𝑏^2−2𝑎𝑏 Here, 𝑎 = l and b = m = (𝒍−𝒎)^𝟐

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Davneet Singh has done his B.Tech from Indian Institute of Technology, Kanpur. He has been teaching from the past 13 years. He provides courses for Maths, Science, Social Science, Physics, Chemistry, Computer Science at Teachoo.