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Example 17 - Evaluate 105 x 106 without multiplying directly - Examples

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Example 17 Evaluate 105 × 106 without multiplying directly. 105 × 106 = (100 + 5) × (100 + 6) Using Identity (x + a) (x + b) = x2 + (a + b)x + ab, where x = 100 , a = 5, b= 6, = (100)2 + (5 + 6) (100) + (5 × 6) = 10000 + (11)(100) + 30 = 10000 + 1100+ 30 = 11130

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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.