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What is the remainder when the polynomial 7x^2+15x - 12 is divided by x+3?

 Dec 11, 2018
 #1
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Remember that  if we divide by x + a, we are dividing by "-a" in the synthetic division process

 

So.....  in  x + 3....."a" = 3....so  we are dividing by  " - 3"

 

So we have

 

-3   [   7      15       -12

                 -21        18

        ______________

         7      - 6          6

 

The remainder is 6

 

 

cool cool cool

 Dec 11, 2018

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