What is the product of all the possible values of x if x^2 - 9x + 20?	Choose the most appropriate option:
A) – 29
B) – 12
C) 12
D) 20
E) 168

Rationale: "explanation : = > y = x ^ 2 - 9 x + 20 = > y = ( x - 4 ) ( x - 5 ) = > x = 4 , y = 5 product y = ( 4 ) ( 5 ) = 20 answer option 20 answer : d"
Answer: D