More Lessons for Grade 9 Math
Videos, worksheets, solutions, and activities to help Algebra and Grade 9 students learn about solving quadratic equations by completing the square.
Completing The Square
How to complete the square of a quadratic equation where the coefficient of x squared is equal to one or greater than one?
1. Write the quadratic in the form
+ bx + ____ = c + ____
2. If a ≠ 1, divide both sides of the equations by a
3. Add (b/2)2
to both sides of the equation
4. Factor the left side of the equation. It should be a perfect square trinomial. Write it as a binomial squared.
5. Square root both sides of the equation and solve for x.
Completing The Square - Algebra Help
Students learn to solve quadratic equations by completing the square.
Completing the Square - Solving Quadratic Equations.
This video shows a slightly harder example of completing the square to solve a quadratic equation.
Advanced Completing the Square
Students learn to solve advanced quadratic equations by completing the square. Note that the quadratic equations in this lesson have a coefficient on the squared term, so the first step is to get rid of the coefficient on the squared term by dividing both sides of the equation by this coefficient.
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