What 2 square numbers subtract to make 8400?

What two square numbers subtract to make 8400? In other words, when you subtract one square number from another square number, the answer is 8400. 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 = 8400

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

92² - 8² = 8400

92² is 8464 and 8² is 64, therefore the answer to the question "What 2 square numbers subtract to make 8400?" is 8464 and 64 as illustrated below:

8464 - 64 = 8400

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 8400. Below we list alternate solutions if available.

9025 - 625 = 8400
10000 - 1600 = 8400
10609 - 2209 = 8400

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