Mathematics for IGCSE & O level - Equations (Section 8 - No. 20)
What are the key steps when completing the square to solve a quadratic equation?
Isolate the x² and x terms.
Add the square of half of the coefficient of x to both sides.
Factor the left side to form a perfect square.
Apply the quadratic formula.
Förklaring
Completing the square: ensure the leading coefficient is 1, then complete the perfect square and solve.