What 2 square numbers subtract to make 1689?

What two square numbers subtract to make 1689? In other words, when you subtract one square number from another square number, the answer is 1689. What are the two square numbers?

First, note that a square number is what you get when you multiply a number by itself, which means that the square root of a square number will equal a whole number. Thus, this is what we are solving:

A² - B² = 1689

We solved the equation above and found this to be true:

283² - 280² = 1689

283² is 80089 and 280² is 78400, therefore the answer to the question "What 2 square numbers subtract to make 1689?" is 80089 and 78400 as illustrated below:

80089 - 78400 = 1689

Note that there may be more than one solution to a problem like this. Above, we found the lowest combination of square numbers that subtract to 1689. Below we list alternate solutions if available.

714025 - 712336 = 1689

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