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31 July, 03:37

What is an efficient way to compute 47^2-37^2 without using raw calculations?

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  1. 31 July, 07:22
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    (47+37) (47-37)

    Step-by-step explanation:

    47^2-37^2 is a difference of two squares. a^2-b^2 = (a+b) (a-b) so this expression can be factored to (47+37) (47-37) = (84) (10) = 840
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