For cubic equations in two variables, see cubic plane curve. Graph of a cubic function with 3 real roots (where the curve crosses the horizontal axisâwhere y = 0) (and hence no complex roots).n other words, a cubic function is defined by a polynomial of degree three. Setting Æ (x) = 0 produces a cubic equation of the form: Usually, the coefficients a, b, c, d are real numbers. However much of the theory of cubic equations for real coefficients applies to other types of coefficients (such as complex ones).
Neurosis (Boeree, 2006) is Karen Horneyâs theory about the ways in which people attempt to make life bearable for themselves. Unlike other theorists, Horney saw it as âcontinuousâ with normal life.
Betty Neuman Betty Neuman is a nursing theorist who spent many years developing a systems model that looks at patients from a holistic perspective. She studied theories from different theorists and philosophers and used her education and clinical and teaching experiences to arrive at the Neuman Systems Model that has been used as a framework for nursing curriculum throughout the world.