When can I use this method?
For squaring numbers near 50.
The number can be either < or > 50.
One can use this method to square numbers away from 50 as long as it is comfortable to square the difference portions.
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- This method uses the concept (50 + a)2 = [(25 + a) 100] + a2, where ‘(50 + a)’ is the number near 50 and ‘a’ is difference.
- Whenever the number is more than 50, the difference is written as positive (+ve).
- Whenever the number is less than 50, the difference is written as negative (-ve).
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