Answer
9
Work Step by Step
(7x+2)(x-p)
p= $\frac{18}{2}$
p= 9
We check we simplifying the polynomial.
(7x+2)(x-9)
Use FOIL to simplify. FOIL: First (Multiply the first variables in the brackets), outside (Multiply the outer variables), Inside (Multiply the inside variables), Last (Multiply the last variables in the brackets).
7x^{2} + 2x - 63x -18
7x^{2} - 61x -18
Thus the correct answer is 9 because we get the final term to be -18 as seen in the polynomial above.
