Ex 5.2, 1 (v) - Chapter 5 Class 8 Squares and Square Roots

Last updated at August 14, 2026 by

Ex 5.2, 1 - Find square of 42 without actual multiplication - Maths - Ex 5.2

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Ex 5.2, 1 Find the square of the following numbers. (v) 71We know that 71 = 70 + 1 Now, 712 = 71 × 71 = (70 + 1) × (70 + 1) = (70 + 1)2 = 702 + 12 + 2 × 70 × 1 = 4900 + 1 + 140 = 5041

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