# How do you find the c that makes the trinomial #x^2+22x+c# a perfect square?

##### 1 Answer

May 15, 2017

#### Answer:

Which gives

#### Explanation:

This is a process called 'Completing the Square' and does exactly what the name implies...

*To complete* means to add what is missing

You are trying to create a *perfect square*, in this case the square of a binomial.

In

'Half of

This is

In

The trinomial will therefore be

Note that to do this, the coefficient of