The causes of back pain are nearly as numerous as terms used to describe the symptoms. Back pain is a primary reason people seek medical attention. Considering that almost 80% of the adult population will encounter some form of back pain, it could be said that back pain is a universal epidemic.
Multiplicity of a root of a polynomial[edit] Let F be a field and p(x) be a polynomial in one variable and coefficients in F. An element a â F is called a root of multiplicity k of p(x) if there is a polynomial s(x) such that s(a) â  0 and p(x) = (x â a)s(x).
1 If then either the polynomial has a multiple root, or it is the square of a quadratic polynomial. 2  Here are the different cases that can occur: 3  If P D, there is a real double root and two real simple roots. 4  If D P D â  0 or Q â  0)), there is a real double root and two complex conjugate roots.