Example 1 (ii) - Chapter 5 Class 8 Squares and Square Roots

Last updated at July 30, 2026 by

Example 1 - Find square of 42 without actual multiplication - Class 8 - Examples

 

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Example 1 Find the square of the following numbers without actual multiplication. (ii) 42 We know that We know that 42 = 40 + 2 Now, 422 = (40 + 2)2 = 402 + 22 + 2 × 40 × 2 = 1600 + 4 + 160 = 1764

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