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Ex 6.2, 1 - Chapter 6 Class 8 Squares and Square Roots - Part 5

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Ex 6.2, 1 Find the square of the following numbers. (v) 71We know that 71 = 70 + 1 Now, 712 = 71 × 71 = (70 + 1) × (70 + 1) = 70 × (70 + 1) + 1 × (70 + 1) = 70 × 70 + 70 × 1 + (1 × 70) + 1 × 1 = 4900 + 70 + 70 + 1 = 5041

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