Ex 14.4, 12 - Find and correct the errors (z + 5)^2 = z^2 + 25

 

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Question 12 Find and correct the errors in the following mathematical statements. 〖"(z + 5)" 〗^2= 𝑧^2 + 25 Solving L.H.S : 〖"(z + 5)" 〗^2 Using 〖(𝑎+𝑏)〗^2=𝑎^2+𝑏^2+2𝑎𝑏 Here a = z and b = 5 = 〖(𝑧)〗^2 + 〖(5)〗^2 + 2 (z) (5) = 𝑧^2 + 25 + 10z = 𝑧^2 + 10z + 25 ∴ (𝒛+𝟓)^𝟐 = 𝒛^𝟐 + 10z + 25 is the correct statement.

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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.