Today’s Agenda

• Attendance / Announcements

– Exam 1 – Tuesday 9/24

• Covers Chapters 1.1 to 2.4 (skip 2.5)

• BlackBoard Resources

• Questions from HW?

• Finish Section 1.7

• Classwork / Questions

1.7b Quadratic EquationsLast class, we learned how to solve

quadratics using factoring , the zero product property, and the square

root property.

1.7b Quadratic Equations

Solve….

0432

xx

So, we’ll need another tool to

help us solve quadratics…

The Quadratic Formula

a

acbbx

2

42

We have to be able

to identify a, b, c !

0322

xx

01842

x

xx 412

612

3

2 xx

94 x

The Quadratic Formula

1522

xx

Number and type of solutions?

The Quadratic Formula

121232

xx

Number and type of solutions?

The Quadratic Formula

0682

xx

Number and type of solutions?

The Quadratic Formula

0432

xx

Number and type of solutions?

The Discriminant (p. 64)

This is a shortcut to determine what types

of solutions the quadratic has.

The Discriminant

a

acbbx

2

42

Determine the types of solutions

11292

mm

Classwork / Homework*

Page 67

1 – 51 odd (skip 37)

Page 71 (Chapter 1 Review)

All that you can handle!