we can use synthetic division
and then we can find quotient
we can see in the image
we will get



so, we get
.............Answer
A_n= a₁+(n-1)d
a₁ first term
n terms
d distance between each value
a_n= 12+(405-1)(5)=2032
X-12=-4
x=-4+12
x=8
The answer is A