What 2 square numbers subtract to make 891?

What two square numbers subtract to make 891? In other words, when you subtract one square number from another square number, the answer is 891. 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 = 891

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

30² - 3² = 891

30² is 900 and 3² is 9, therefore the answer to the question "What 2 square numbers subtract to make 891?" is 900 and 9 as illustrated below:

900 - 9 = 891

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 891. Below we list alternate solutions if available.

2116 - 1225 = 891
2916 - 2025 = 891
22500 - 21609 = 891

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