Ex 1.4, 2 (iii) - Chapter 1 Class 9 Number Systems

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Ex1.5, 2 Simplify each of the following expressions: (iii) ( 5 + 2)2 ( 5 + 2)2 We know that (a + b)2= a2 + b2 + 2ab where a = 5 , b = 2 = ( 5)2 + ( 2)2 + 2 ( 5) ( 2) = 5 + 2 + 2 (5 2) = 5 + 2 + 2 10 = 7 + 2 10

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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, Social Science, Physics, Chemistry, Computer Science at Teachoo.