## What is the Cardano formula?

The Cardano formula for the roots of (1) has the form: x=3√−q2+√q24+p327+3√−q2−√q24+p327.

## How do you solve cubics in Matlab?

1. function sols = solve_cubic(a, b, c, d)
2. syms x.
3. sols = solve(a*x^3 + b*x^2 + c*x + d);
4. end.

What is Cardano method?

Cardano’s method provides a technique for solving the general cubic equation. ax3 + bx2 + cx + d = 0. in terms of radicals. As with the quadratic equation, it involves a “discriminant” whose sign determines the number (1, 2, or 3) of real solutions.

How do you find the roots of a cubic equation in Matlab?

r = roots( p ) returns the roots of the polynomial represented by p as a column vector. Input p is a vector containing n+1 polynomial coefficients, starting with the coefficient of xn. A coefficient of 0 indicates an intermediate power that is not present in the equation.

### What is Ferrari method?

The Ferrari method is a method for reducing the solution of an equation of degree 4 over the complex numbers (or, more generally, over any field of characteristic ≠2,3) to the solution of one cubic and two quadratic equations; it was discovered by L. Ferrari (published in 1545).

### How do you calculate cubic equations?

How to Solve Cubic Equations? The traditional way of solving a cubic equation is to reduce it to a quadratic equation and then solve it either by factoring or quadratic formula. Like a quadratic equation has two real roots, a cubic equation may have possibly three real roots.

What are the roots of cubic equation?

The three roots of x3 + ax + b are the real numbers 2R, -R + /3I, and -R – /3I. These four steps together are the cubic formula. It uses complex numbers (D and z) to create real numbers (2R, -R + /3I, and -R – /3I) that are roots of the cubic polynomial x3 + ax + b.