Using synthetic division, find (2x^4 - 3x^3 - 20x -21) + (x-3).

Step-by-step explanation:

i think you want to know if x-3 is a factor.

x-3=0

x=3

3 ) 2  -3  -20  -21

  |       6   9    -33

  |

     2   3  -11  |-54

remainder is not zero,it is -54

so x-3 is not a factor of 2x^4-3x²-20x-21

2.   2 3/5.

3.   2 1/2.

step-by-step explanation:

6 - 3 2/5

= 6 -   17/5

= 30/5 - 17/5

= 13/5

= 2 3/5 (answer).

5 1/4 - 2 3/4

= 21/4 - 11/4

= 10/4

= 2 1/2 (answer).