Answer:
2(x+6)(x-3)
Step-by-step explanation:
Factor the GCF out of the trinomial on the left side of the equation.

Greatest common factor of 2, 6, 18 is 2
so GCF is 2
divide each term when we take out GCF 2
so 
now factor the trinomial
product is -18 and sum is +3
6 times -3 is -18 and 6-3=3

448 is the surface area of the rectangular prism
In a. they use reflections however there is a shadow so it is unclear, in B. they use rotation, in c. They use reflection.