# How do you solve using the completing the square method # x^2+8x=9#?

##### 1 Answer

Feb 28, 2016

(see below for method of completing the square).

#### Explanation:

A general squared binomial has the relation:

If

then

and the third term needed to complete the square would be

If we add

we will need to add

Re-writing the left side as a squared binomial and simplifying the right side:

If we take the square root of both sides:

which implies:

either