We say that a nonconstant polynomial $p(x)$ with real coefficients is split into two squares if it is represented as $a(x) +b(x)$ where $a(x)$ and $b(x)$ are squares of polynomials with real coefficients. Is there such a polynomial $p(x)$ that it may be split into two squares: a) in exactly one way; b) in exactly two ways? Note: two splittings that differ only in the order of summands are considered to be the same. Sergey Markelov