# How to use the completing the square method to solve quadratic equations. The completing the square method is a technique used to solve quadratic equations. This method can be used to find the exact value of a quadratic equation, or to find approximate solutions. In order to use the completing the square method, you must first be able to rewrite a quadratic equation in the form.

This is a quadratic equation in standard form. To solve the equation using the completing the square method, you will need to complete the square on the left-hand side of the equation.

To complete the square, you will need to find the square root of the left-hand side of the equation. This will give you a number that can be added to both sides of the equation. Once the square root is added to both sides of the equation, you can solve the equation for the variable.

## What is the completing the square method?

The completing the square method is a way to solve a quadratic equation by transforming it into another equation that is easier to solve. This can be done by adding a constant to both sides of the equation so that one side is a perfect square. Then, the equation can be factored and solved using the quadratic formula.

For example, consider the equation x^2 + 6x + 5 = 0. This cannot be solved using the quadratic formula because it is not in the proper form. However, it can be transformed into a form that can be solved using the completing the square method.

First, add a constant to both sides of the equation so that one side is a perfect square. In this case, we will add 9 to both sides.

x^2 + 6x + 5 + 9 = 0 + 9

(x^2 + 6x + 14) = 9

Next, we can factor the left side of the equation as follows:

(x^2 + 6x + 14) = (x + 3)^2

Now that the left side is a perfect square, we can take the square root of both sides to solve for x.

sqrt ((x + 3) ^2) = sqrt(9)

x + 3 = 3 or x + 3 = -3

x = 0 or x = -6

## Method be used to solve quadratic equations

The completing the square method is a handy technique that can be used to solve quadratic equations. This method can be used to transform a quadratic equation into an equation that can be easily solved.

To use the completing the square method, we need to follow these steps:

• First, we need to identify the coefficients of the quadratic equation. These are the numbers that are multiplied by the variables (x^2, x, and 1).
• Next, we need to determine the value of the constant term. This is the number that is not multiplied by any variables.
• Once we have these values, we can begin to transform the equation. We need to take the coefficient of x^2 and square it. Then, we add this value to both sides of the equation.
• On the left side of the equation, we will have a perfect square. On the right side of the equation, we will have the constant term. We can now use the quadratic formula to solve for x.

## What are the benefits of using the completing the square method to solve quadratic equations?

The completing the square method is a way to solve quadratic equations by rewriting them in a form that is easier to work with. This method is especially useful when the equation is not in the standard form (ax^2 + bx + c = 0).

There are a few steps to follow when using this method:

• Rewrite the equation in standard form, if it is not already in that form.
• Take the coefficient of x^2 (a) and multiply it by 2. This will be used later.
• Add the square of half of the coefficient of x (b/2) to both sides of the equation.
• Rewrite the equation as a perfect square.
• Solve the equation by taking the square root of both sides.