1. Chapter 5 Class 8 Squares and Square Roots
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  3. Examples
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Example 1 (i) - Chapter 5 Class 8 Squares and Square Roots

Last updated at Dec. 16, 2024 by Teachoo

 

 

Transcript

Example 1 (Method 1) Find the square of the following numbers without actual multiplication. (i) 39 We know that 39 = 40 − 1 Now, 392 = (40 − 1)2 = 402 + 12 − 2 × 40 × 1 = 1600 + 1 − 80 = 1601 − 80 = 1521 Example 1 (Method 2) Find the square of the following numbers without actual multiplication. (i) 39 We know that 39 = 30 + 9 Now, 392 = (30 + 9)2 = 302 + 92 + 2 × 30 × 9 = 900 + 81 + 540 = 1521
  1. Chapter 5 Class 8 Squares and Square Roots
  2. Serial order wise

    3. Examples

    Square numbers →
Square numbers →
Chapter 5 Class 8 Squares and Square Roots
Serial order wise

About the Author

Davneet Singh

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 and Computer Science at Teachoo