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