Use synthetic division to find P(-10) for P(x)= 2x^3+14x^2-58x

Question

Use synthetic division to find P(-10) for P(x)= 2x^3+14x^2-58x

Answer 1

Hi Nora,

 

Write the coefficients. Make sure to use 0 for the constant.

 

-10| 2  14  -58   0

     |__-20_ 60_-20___

       2  -6    2   -20

 

You bring down the first coefficient. Multiply by -10, write under the second coefficient. Add. Repeat.

 

You will get  2x^2 - 6x + 2 +    -20

                                           -------

                                            x + 10