# How do you graph and label the vertex and axis of symmetry of #y=(x+2)(x-4)#?

##### 1 Answer

Jul 29, 2018

To find the x intercepts:

When x=4, y=0 and when x=-2, y=0

To find the y intercept:

When x=0, y=-8

To find the x coordinate of the axis of symmetry:

Expand the brackets

To find the coordinates of the vertex

When x=1, y=-9

Minimum at (1, -9)

Axis of symmetry is x=1

y intercept (0, -8)

x intercepts (4,0) and (-2,0)