SOLUTION: there exist two real number x, y such that the product of their sum and difference is equal to the difference of their square

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Question 1165796: there exist two real number x, y such that the product of their sum and difference is equal to the difference of their square
Answer by ikleyn(52800) About Me  (Show Source):
You can put this solution on YOUR website!
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For any two real numbers x and y, the product of their sum (x+y) and their difference (x-y)
is the difference of their squares.

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See the lesson
    - The difference of squares formula
in this site.