2-Digit Square

A 2-Digit number is squared. When this 2-digit number is reversed and squared, the difference between the squares is also a square. What is the 2-digit number?
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Problem

2-digit Square printable sheet

 

A $2$-digit number is squared. When the $2$-digit number is reversed and squared, the difference between the squares is also a square.

 

What is the $2$-digit number?