# What is the vertex form of #y= x^2+8x+20 #?

##### 2 Answers

Mar 11, 2018

Vertex is (-4,4 )

#### Explanation:

this can also be written as ,

y =

which can be further simplified into,

y =

We know that,

comparing both the equations we get vertex as (-4,4)

graph{x^2 + 8x +20 [-13.04, 6.96, -1.36, 8.64]}

Mar 11, 2018

#### Explanation:

The vertex form is:

when

Now:

then the vertex form is:

Second method: