# How do you solve using the completing the square method # x^2 + 7x – 9 = 0#?

##### 1 Answer

Mar 15, 2016

Answer:

#### Explanation:

To solve by completing the square, first add 9 to both sides

Then you have to manipulate the number in front of

Add this to both sides of the above equation, giving

This creates a perfect square on the left, such that

Take the square root of both sides, giving

Don't forget that

Plugging that into a calculator gives: