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16-09-2021
Mathematics

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What is the difference between the 11th square number and the 2nd square number?

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sqdancefan sqdancefan

19-09-2021

9514 1404 393

Answer:

117

Step-by-step explanation:

The n-th square number is n². The difference of interest is ...

11² -2² = 121 -4 = 117

__

This can also be figured as ...

11² -2² = (11 -2)(11 +2) = 9×13 = 117

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