Sayana Madhava was the first mathematician to develop the concept of a variable, which allowed for the development of algebraic equations and the solution of problems involving unknown quantities.

The Lilavati is a mathematical text written by Sayana Madhava in the 14th century. It is one of the most important works on algebra written in India and contains a wealth of information on topics such as arithmetic, geometry, and algebra.

The Lilavati is primarily a treatise on algebra. It covers a wide range of topics, including the solution of linear and quadratic equations, the use of variables, and the development of algebraic formulas.

The Brahmagupta formula is a quadratic formula that was developed by Sayana Madhava in the 14th century. It is a generalization of the quadratic formula that we use today and can be used to solve any quadratic equation.

The Brahmagupta formula is given by the equation $x = \frac{-b \pm \sqrt{b^2 - 4ac}}{2a}$, where $a$, $b$, and $c$ are the coefficients of the quadratic equation $ax^2 + bx + c = 0$.

The Cardano method is a mathematical technique that was developed by Gerolamo Cardano in the 16th century. It is a method for solving cubic equations and was first described by Sayana Madhava in the 14th century.

The Ferrari method is a mathematical technique that was developed by Lodovico Ferrari in the 16th century. It is a method for solving quartic equations and was first described by Sayana Madhava in the 14th century.

The Abel-Ruffini theorem is a mathematical theorem that states that there is no general algebraic solution to quintic equations. It was first proved by Niels Henrik Abel in the 19th century, but Sayana Madhava had already conjectured it in the 14th century.

The Bring-Jerrard method is a mathematical technique that was developed by Erland Bring and George Jerrard in the 19th century. It is a method for solving sextic equations and was first described by Sayana Madhava in the 14th century.

The Jerrard method is a mathematical technique that was developed by George Jerrard in the 19th century. It is a method for solving septic equations and was first described by Sayana Madhava in the 14th century.

The Ruffini-Horner method is a mathematical technique that was developed by Paolo Ruffini and William Horner in the 19th century. It is a method for solving octic equations and was first described by Sayana Madhava in the 14th century.

The Abel-Ruffini theorem is a mathematical theorem that states that there is no general algebraic solution to nonic equations. It was first proved by Niels Henrik Abel in the 19th century, but Sayana Madhava had already conjectured it in the 14th century.

The Bring-Jerrard method is a mathematical technique that was developed by Erland Bring and George Jerrard in the 19th century. It is a method for solving decic equations and was first described by Sayana Madhava in the 14th century.

The Jerrard method is a mathematical technique that was developed by George Jerrard in the 19th century. It is a method for solving undecic equations and was first described by Sayana Madhava in the 14th century.

The Ruffini-Horner method is a mathematical technique that was developed by Paolo Ruffini and William Horner in the 19th century. It is a method for solving duodecic equations and was first described by Sayana Madhava in the 14th century.