### Home > AC > Chapter 8 > Lesson 8.2.3 > Problem 8-68

8-68.

The roots (-intercepts) of

*are*

What is the

-coordinate of the vertex? How do you know?Use your answer to part (a) above to find the

-coordinate of the vertex. Then write the vertex as a point.

The coordinate of the vertex is halfway between

Substitute the vertex value of back into the original equation to find

*.*

Solve for .

Coordinates