6 -6 Factoring by Grouping by yurtgc548

VIEWS: 3 PAGES: 10

									3 minutes
               Warm-Up
  Add or subtract.
    5 3                      13 8
  1.                     2.   
    7 7                       3 3



    3 7                      4  1
  3.                     4. 
    4 8                     15 10




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10.4 & 10.5 Addition and Subtraction
   Objectives:
        To add and subtract rational numbers
              Example 1
Add and simplify.
    3      2       32
               
  2x  3 2x  3   2x  3
                        5
                    
                      2x  3




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              Example 2
Subtract and simplify.
  m  9 4m  6   m  9  ( 4m  6)
               
  m3    m3            m3
                     m  9  4m  6
                   
                         m3
                     5m  15
                   
                      m3
                     5(m  3)
                             5
                      m3

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                 Practice
 Add or subtract and simplify.
   8x 2
          2x 2         2y2  4y  3 y2  2y  12
                  2)              
1) x  4 x  4            y 3          y 3




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               Example 3
Add and simplify.
      x 3x       x  5  3x  2 
                        
      2 5        2 5 5 2
                  5x 6x
                   
                  10 10

                  11x
                
                  10




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              Example 4
Add and simplify.
       2    3           2  2x  3  x  2 
                                        
     x  2 2x         x  2  2x  2x  x  2 
                          4x        3(x  2)
                                
                      2x(x  2) 2x(x  2)
                      4x  3(x  2)
                    
                       2x(x  2)
                       4x  3x  6
                     
                        2x(x  2)
                        7x  6
                     
                       2x(x  2)
             Example 5
Subtract and simplify.
           5       x 2   5
     5         5     
         x 2      x 2 x 2
                 5x  10     5
                        
                  x 2     x 2
                 5x  10  5
               
                    x 2
                 5x  15
               
                  x 2
                 5(x  3)
               
                  x 2
                   Practice
 Add or subtract and simplify.

     x       4                       1
1) x  2  x  2            2) 6 
                                   x 2




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            Homework
p.443 #5,11,13,15,19,21
p.448 #5,9,13,17,39,45




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