Mathematics for IGCSE & O level - Equations (Section 8 - No. 34)

What is the purpose of completing the square?

To find the factors of a quadratic equation.

To change the subject of a formula.

To rewrite a quadratic expression in a different form.

To eliminate the constant term in a quadratic equation.

Completing the square rewrites the equation in the form a(x+p)² + q.