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Completing the Square

Completing the Square

Author: Serena Foltz

Solve quadratic equations by completing the square

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Completing the Square is where you...

Take a Quadratic Equation in Standard Form like this:

ax^2 + bx + c = 0

and turn it into Vertex Form like this:

a(x+d)^2 + e = 0

Further Understanding

For even more understanding.


Click HERE when a = 1


for a is not equal to 1 Click  HERE


Skill Builder

Click HERE to practice completing the square


Source: Khan academy

Fun and Games

Click HERE to play Completing the Square


Check for Understanding

Click HERE and complete assessment to check for understanding.

Email your results to


Click HERE and complete assessment.