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23-09-2019
Mathematics

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

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23-09-2019

Answer:

(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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