Philanthropy involves the donation[?] or granting of money to various worthy charitable causes. In the United States philanthropists included some of the wealthest individuals of the twentieth century. It is seen as a way to directly effect change in society without recourse to the bureaucratic mechanisms of government.

... expresses the explicit solution(s) x to the quadratic equation
<math>ax^2+bx+c=0</math>
in terms of the coefficients a, b and c, which are assumed to b ...