SOLUTION: Please help with the following problems. Thank you (3b+2/3)(6b-1/3) 4xy³(2x-y)(3x+y)

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Question 24355: Please help with the following problems. Thank you
(3b+2/3)(6b-1/3)
4xy³(2x-y)(3x+y)
Answer by AnlytcPhil(1806)   (Show Source): You can put this solution on YOUR website!
                             (3b + 2/3)(6b - 1/3) 
Use FOIL:
                 (3b)(6b) - (3b)(1/3) + (2/3)(6b) - (2/3)(1/3)
                     ¯          ¯            ¯          ¯  
                    18b2  -     b     +     4b    -    2/9
                       
                             18b2 + 3b - 2/9  



                                      4xy3(2x-y)(3x+y)

Use FOIL on the two parenthetical expressions  

                                   4xy3(6x2+2xy-3yx-y2)

Combine like terms, realizing that xy and yx are the same

                                     4xy3(6x2-xy-y2)

Use distributive principle:
                                 24x3y3 - 4x2y4 - 4xy5

Edwin
AnlytcPhil@aol.com
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