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Mathematics 16 Online
OpenStudy (waheguru):

How Do You Tackle a question like this Two numbers that differ by 2 can be multiplied by squaring their average and then subtracting 1. For example 14*16=15^2-1 = 224. How does the product and sum difference (x-1)(x+1) explain this method and Develop a similar method for multiplying two numbers that differ by 4

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