Do Now : Evaluate when x = 6, y = -2 and z = 3

6-5 The Quadratic Formula and the Discriminant Objectives Students will be able to: 1)Solve quadratic equations by using the Quadratic Formula 2)Use the discriminant to determine the number and type of roots of a quadratic equation

Using the quadratic formula is yet another way to solve quadratic equations. Find the solutions of a quadratic equation in the form

Solve each equation by using the quadratic formula. 1)

2)

3)

4)

Try these. 5)6)

The discriminant The discriminant is the expression within the quadratic formula that is can be used to determine the number and type of roots of a quadratic equation.

Find the value of the discriminant for each quadratic equation. Then describe the number and type of roots for the equation. 1)2)

3)4)

Try these. 5)6)

Homework Text p. 318 #s all