How to Evaluate b^2 - 4ac Given a, b, and c

How to evaluate an expression given values for the variable. USE PARENTHESES where you see a variable and then plug in the given values.

The first step in understanding algebra is to realize that letters are used to represent numbers. Sometimes the problem will specifically state what number the letter represents, in which case, you replace the letter with that number and then simplify. This is called evaluating.

Chapter 2 - Linear Equations and Inequalities

2.1 Introduction to Algebra
2.2 Simplifying Algebraic Expressions
2.3 Linear Equations: Part I
2.4 Linear Equations: Part II
2.5 Applications of Linear Equations
2.6 Ratio and Proportion Applications
2.7 Introduction to Inequalities and Interval Notation
2.8 Linear Inequalities (one variable)
2.9 Review Exercises and Sample Exam