The formula for finding roots is a mathematical formula for directly expressing roots by the coefficients of equations. This formula was given by Alhualamo in Central Asia as early as the 9th century, and the unary quadratic formula AX 2+BX+C = 0 can be solved by finding the root formula x=. The root formula of quadratic equation with one variable is the basic formula of mathematical algebra, and its purpose is to solve quadratic equation with one variable. An integral equation that contains only one unknown (unary) and the highest order of the unknown is 2 (quadratic) is called unary quadratic equation. The formula for finding the root of the unary cubic equation is ax 3+bx 2+CX+d = 0. The root formula of univariate quartic equation AX 4+BX 3+CX 2+DX+E = 0 was discovered by Flary, a student of Kadan.