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Example 22 - Write the following cubes in expanded form - Identity VI & VII

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Example 22 Write the following cubes in the expanded form: (3a + 4b)3 (3a + 4b)3 Using (x + y)3 = x3 + y3 + 3xy(x + y) Where x = 3a & y = 4b = (3a)3 + (4b)3 + 3(3a)(4b)(3a + 4b) = 27a3 + 64b3 + 3(3a)(4b)(3a) + 3(3a)(4b) (4b) = 27a3 + 64b3 + 108a2b + 144ab2

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Davneet Singh

Davneet Singh has done his B.Tech from Indian Institute of Technology, Kanpur. He has been teaching from the past 12 years. He provides courses for Maths, Science, Social Science, Physics, Chemistry, Computer Science at Teachoo.