1. Lesson 7.3 Using the Quadratic Formula
Objective - To find the x-intercepts of a quadratic equation using the quadratic formula. x y
Find x-intercepts of... x y -4 -3 -2 -1 1 2
x-intercepts
solutions
zeroes
roots
Algebra I by James Wenk © 2003 published by TEACHINGpoint as part of the Expert Systems for Teachers Series
Algebra 1 by James Wenk © 2003 published by TEACHINGpoint

2. Find x-intercepts of the equation below.y x y -3 -2 -1 1 2 3
x-intercepts
Algebra I by James Wenk © 2003 published by TEACHINGpoint as part of the Expert Systems for Teachers Series

3. Find x-intercepts of the equation below.y
To find x-intercepts
Set y = 0
Can’t solve!
x-intercepts
Algebra I by James Wenk © 2003 published by TEACHINGpoint as part of the Expert Systems for Teachers Series

4. Quadratic Equation Quadratic Formula Compare to graph!
Algebra I by James Wenk © 2003 published by TEACHINGpoint as part of the Expert Systems for Teachers Series

5. Find the x-intercepts of the equation below.
Algebra I by James Wenk © 2003 published by TEACHINGpoint as part of the Expert Systems for Teachers Series

6. Algebra I by James Wenk © 2003 published by TEACHINGpoint as part of the Expert Systems for Teachers Series

7. Algebra I by James Wenk © 2003 published by TEACHINGpoint as part of the Expert Systems for Teachers Series

8. Algebra I by James Wenk © 2003 published by TEACHINGpoint as part of the Expert Systems for Teachers Series