The polynomial

may have solutions which are the divisors of -20, therefore -20 has the following divisors:

.
If x=1, then

,
if x=-1, then

,
if x=2, then

, then x=2 is a solution and you have the first factor (x-2).
If x=-2, then

, then x=-2 is a solution, so you have the second factor (x+2).
Since x-2 and x+2 are two factors of

, then the polynomial

is a divisor of

and dividing the polynomial

by

you obtain

.
C=5/9 (95F-32)
C=5/9 (63)
C= 5/9 times 63/1= 35
Celsius= 35 degrees
There is the answer :) hope that helps more than the first person who answered lol