Answer:
-9
Step-by-step explanation:
In synthetic division we are multiplying the number -1 with the number written at the last line.
So here first we multiplied -1 with 3 to get -3, write it down below -4.
Now when we add -4 and -3 we get -7.
Again we multiply -1 with -7 , to get 7, writing it down below 2.
Then we add 2 and 7 to get 9.
Again we multiply -1 with 9 , that will give us -9.
So we write -9 below -1 in last column to get -10.
So the missing number is -9.
