Jeremy E. answered 02/10/19
Mathematics, Programming, Physics, Automation, and Guitar
looks intereseting. lets see:
since a polynomial is defined by at least three points, if there were 3 or more perfect square values, there would be an infinite number of perfect square values, because the polynomial would be factorable into a perfect square. since this polynomial is not factorable into a perfect square, there can be at most two values where it can pass through a perfect square point.
Excel says that the value 14 is at least one of these values. I leave you to check for the other and determine how to find this value manually