# What is the vertex form of #y= (x-1)(x – 6) #?

##### 1 Answer

#### Explanation:

Let's convert this into standard form. Then we can "complete the square" to solve for the vertex form.

Now let's *complete the square*. To do that, we need to find a value that make

Now we have the value that makes the equation true. **But!!** we cannot introduce a new value! Not without immediately subtracting it, which would make the final value

So, we added

Let's rewrite

Now our equation is

*combine like-terms*