You can 
put this solution on YOUR website! Use polynomial long division.
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          5b^2 + (-2b) +   7
        __________________________
6b + 3 | 30b^3 +  3b^2 +  36b + 30
      - (30b^3 + 15b^2)
       ---------------
                -12b^2 +  36b
             - (-12b^2 + (-6b))
                --------------
                          42b + 30
                      -  (42b + 21)
                          --------
                                 9
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