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Question
Find the square of the given number.
71
Solution
712 = (70 + 1)2
= (70 + 1) (70 + 1)
= 70 (70 + 1) + 1 (70 + 1)
= 702 + 70 × 1 + 1 × 70 + 12
= 4900 + 70 + 70 + 1
= 5041
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