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  1. Chapter 12 Class 7 Algebraic Expressions
  2. Serial order wise

Transcript

Example 4 Collect like terms and simplify the expression: 12m2 – 9m + 5m – 4m2 – 7m + 10 12m2 – 9m + 5m – 4m2 – 7m + 10 = 12m2 − 4m2 + 5m − 9m − 7m + 10 = m2 (12 − 4) + m (5 − 9 − 7) + 10 = m2 (8) + m (−4 − 7) + 10 = 8m2 + m (−11) + 10 = 8m2 − 11m + 10

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Davneet Singh
Davneet Singh is a graduate from Indian Institute of Technology, Kanpur. He has been teaching from the past 9 years. He provides courses for Maths and Science at Teachoo.