Now Try ExercisesTo actively engage students in the learning process, we now
include a parallel margin exercise juxtaposed with each numbered example. These all-
new exercises enable students to immediately apply and reinforce the concepts and
skills presented in the corresponding examples. Answers are conveniently located on
the same page so students can quickly check their results. (See pages 3 and 92.)
Revised Exposition As each section of the text was being revised, we paid special
attention to the exposition, which has been tightened and polished. (See Section 5.
Adding and Subtracting Polynomials, for example.) We believe this has improved
discussions and presentations of topics.
Specific Content ChangesThese include the following:
N We gave the exercise sets special attention. There are approximately 1200 new
and updated exercises, including problems that check conceptual understanding,
focus on skill development, and provide review. We also worked to improve the
even-odd pairing of exercises.
N Real-world data in over 165 applications in the examples and exercises have been
updated.
N There is an increased emphasis on the difference between expressions and equa-
tions, including a new example at the beginning of Section 2.1, plus correspond-
ing exercises. Throughout the text, we have reformatted many example solutions
to use a “drop down” layout in order to further emphasize for students the differ-
ence between simplifying expressions and solving equations.
N We increased the emphasis on checking solutions and answers, as indicated by
the new CHECKtag and ✓in the exposition and examples.
N Section 2.2 has been expanded to include a new example and exercises on solv-
ing a linear equation in two variables for y. A new objective, example, and exer-
cises on percent increase and decrease are also provided.
N Section 3.5 Introduction to Functions from the previous edition has been ex-
panded and split into two sections.
N Key information about graphs is displayed prominently beside hand-drawn
graphs for the various types of functions. (See Sections 5.3, 7.4, 8.1, 9.5, 9.6,
10.2, 10.3, and 11.1.)
N An objective, example, and exercises on using factoring to solve formulas for
specified variables is included in Section 6.5.
N Presentations of the following topics have also been enhanced and expanded:
Solving three-part inequalities (Section 2.5)
Finding average rate of change (Section 3.2)
Writing equations of horizontal and vertical lines (Section 3.3)
Determining the number of solutions of a linear system (Section 4.1)
Solving systems of linear equations in three variables (Section 4.2)
Understanding the basic concepts and terminology of polynomials (Section 5.2)
Solving equations with rational expressions and graphing rational functions
(Section 7.4)
Solving quadratic equations by factoring and the square root property
(Section 9.1)
x Preface
