Quadratic equations are second-degree algebraic expressions and are of the form \$ax^2 + bx + c = 0\$.

Explanation: A quadratic equation is an algebraic equation of the second degree in x, standard form is \$ax^2 + bx + c = 0\$, where a and b are the coefficients, x is the variable, and c is the constant term.

Example: \$25n^2 + 10n + 1 = 0\$

The two values of x, which are obtained by solving the quadratic equation.

Explanation: The roots of a quadratic equation are the two values of x, which are obtained by solving the quadratic equation.
Here roots of the quadratic equation are also called the zeros of the equation.