1. 10-6 Using the Quadratic Formula

2. What is it? The quadratic formula is a method for solving quadratic equations in the for ax 2 + bx + c.

3. Let’s try one! Solve using the quadratic formula. a=1, b=-5, c=6 Substitute these values into the formula:

4. Let’s try another one! Solve using the quadratic formula. a=1, b=-2, c=-8 Rewrite it…

5. Let’s try another one! Solve using the quadratic formula. a=-3, b=5, c=-2

6. One more! Solve using the quadratic formula. a=7, b=-2, c=-8

7. Choosing the Right Method for Solving Quadratic Equations There are many methods…how to decide? The quadratic formula always works but is not always the easiest. Sometimes you can easily see the factors, then factoring is easiest. Competing the square…is probably more involved than using the quadratic formula.