# How to solve a quadratic equation by completing the square

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What is Completing the Square?
Completing the square is a process to convert a quadratic equation from
the general form y = ax2 + bx + c
to the vertex form y = a(x - h)2 + k
The vertex form can be used to find the vertex of a quadratic equation and to solve a quadratic equation.

The following diagram gives the vertex form of a quadratic equation. Scroll down the page for more examples and solutions.

Completing the Square (Tutorial 1)

Completing the Square (Tutorial 2)
Completing the Square (Tutorial 3)
How to Solve a Quadratic Equation by Completing the Square?

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