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Section 1.2 ­ Algebraic Expressions and Models A.notebook      July 29, 2009




              Section 1.2 ­ Algebraic Expressions and Models




           Vocab               Numerical Expression: consists of 
           Terms               numbers, operations, and grouping 
                               symbols.
                                  
                               Example: 5 + 7; 2(4 ­ 2)

                              Algebraic Expression: like above, 
                              with variables
                                 
                              Example: 2x + 3; 5y(3y ­ 7)




                                                                               1
Section 1.2 ­ Algebraic Expressions and Models A.notebook           July 29, 2009


          Order of             1. Operations inside grouping 
          Operations           symbols
                               2. Evaluate powers
                               3. Multiply & divide left to right
                               4. Add & subtract left to right




          Using 
          Order of               ­4 + 2(­2 + 5)2 
          Operations




                                                                                    2
Section 1.2 ­ Algebraic Expressions and Models A.notebook     July 29, 2009


          Evaluating 
                             Evaluate ­3x2 ­ 5x + 7 when x = ­2
          Algebraic 
          Expressions




          Simplifying 
                              Simplify 2(x + 1) ­ 3(x ­ 4)
          Algebraic 
          Expressions




                                                                              3
Section 1.2 ­ Algebraic Expressions and Models A.notebook   July 29, 2009



          Homework            Section 1.2 Worksheet

                              #2 ­ 42 even




                                                                            4

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Section 1.2 Algebraic Expressions And Models A