Example 16 - Class 9
Last updated at May 29, 2018 by Teachoo
Transcript
Example 16 Find the following products using appropriate identities: (x + 3) (x + 3) (x + 3)(x + 3) = (x + 3)2 Using (a + b)2 = a2 + 2ab + b2 putting a = x, b = 3 = x2 + 2(x)(3) + (3)2 = x2 + 6x + 9 Example 16 Find the following products using appropriate identities: (ii) (x – 3) (x + 5) (x – 3) (x + 5) Using (x + a) (x + b) = x2 + (a + b)x + ab, putting a = –3, b = 5 = x2 + (–3 + 5)x + (–3)(5) = x2 + 2x – 15
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About the Author
Davneet Singh
Davneet Singh is a graduate from Indian Institute of Technology, Kanpur. He has been teaching from the past 8 years. He provides courses for Maths and Science at Teachoo. You can check his NCERT Solutions from Class 6 to 12.