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13 August, 20:06

Task 6-Polynomial Identities

Pick a two-digit number greater than 25. Rewrite your two-digit number as a difference of two numbers. Show how to use the identity (x - y) 2 = x2 - 2xy + y2 to square your number without using a calculator.

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  1. 13 August, 20:35
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    36=40-4 362 = (40-4) 2=402-2⋅40⋅4+42 = 1600-320+16=1296
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