Help again, I will give Brainliest to whomever answers right and first!

Answer:
-7
Step-by-step explanation:
(x²+6x-16)(x-2) = x³+4x²-28x+32
x³+4x²-28x+32 = ax³+bx²+cx+d
a=1; b=4; c= -28; d= 32
-28/4 = -7