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x^2 - y^2

Math brain teasers require computations to solve.


Puzzle ID:#8508
Fun:*** (2.36)
Difficulty:*** (2.43)
Submitted By:lesternoronha1****




Lester is very intent on finding a formula to calculate the difference between two squares but doesn't have any squared terms in it.
Eg: If x and y are two numbers with y>x then he wants to find a formula to calculate (y^2)-(x^2) which does not contain any x^2 or y^2 terms in it.

He finds that there are two cases:
a) when x and y are consecutive.
b) when x and y are not consecutive.

Can you help him find the formula?

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