# How do you find the important parts of the equation to graph the function #y=(x-2)(x+9)#?

##### 1 Answer

Oct 18, 2015

x-intercepts:

y-intercept:

vertex:

#### Explanation:

**x-intercepts**

the values of

Based on the given form:

these values are

**y-intercept**

the value of

**vertex**

Converting into vertex form:

complete the square

which is the vertex form with vertex at

We can check the graph to see that these values are reasonable:

graph{(x-2)(x+9) [-60, 60, -40, 25]}