## Multiplication of two numbers that differ by 6

### If the two numbers differ by 6 then their product is the square of their average minus 9.

Let me explain this rule by taking examples

10*16 = 13^2 - 9 = 160

22*28 = 25^2 - 9 = 616-
## Example.

Understand the rule by 1 more example

997*1003 = 1000^2 - 9 = 999991 -
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