Mathematics for IGCSE & O level - Equations (Section 4 - No. 17)

What are the key elements needed when using the quadratic formula to solve an equation?

The coefficients a, b, and c of the quadratic equation.

The constant term of the equation.

The x-intercept of the equation.

The degree of the equation.

The coefficients a, b, and c are all required by the formula. The constant term and x-intercept are also important.