Find the coefficient using synthetic division and the answer as a rational expression?

ANSWER
EXPLANATION
In the method of synthetic division, we only use the coefficients. First, we have to write the coefficients of the dividend,
Then we write the test zero on the left. The test zero is the zero of the denominator, 2. Carry down the first coefficient,
Then, multiply the test zero by the first red number, and add it to the second column,
Repeat with all the coefficients,