You may want to store equations in a calculator so they can be graphed. ... Some of the solvers included are the linear equation solver, quadratic equation solver and cubic equation solver.

Otherwise, one real and two complex roots will result, which is meaningless for the stress-cubic equation. The Table lists the roots of Eq 5 for various values of the coefficient, Q.

Charles Gilpin, Jr., Approximation of the Greatest Root of a Cubic Equation with Three Real Roots, The American Mathematical Monthly, Vol. 13, No. 6/7 (Jun. - Jul., 1906), pp. 140-141 ...