1. The Quadratic Formula

2. When can I use it?!?!? Anytime! In place of factoring In place of solving using square roots Pros and Cons to using it though

3. Pros of the Quadratic Formula It can be used anytime Sometimes it is not possible to factor, so the quadratic formula will still let you solve the problem When you don’t know what to do, use it!

4. Cons of the quadratic formula When it is possible to factor, factoring is faster and the quadratic formula could slow you down. Easy to make mistakes when using the quadratic formula

5. Common errors/things to look out for! There are two solutions to the quadratic formula Watch out for negative signs Make sure you put the equation in standard form ax 2 +bx+c

7. Steps for solving Put the equation in standard form Identify a, b, and c coefficients Plug into the formula Solve for the positive and negative solutions

8. Solve 2k 2 +9k=-7

9. Solve 5r 2 =80

10. Solve 2x 2 -36=x

11. Solve 5x 2 +9x=-4

12. Solve k 2 -31-2k=-6-3k 2 -2k