Answer:
y=x-4
Step-by-step explanation:
(x-12)(x-12) would factor to x²-24x+144.
(x-12)(x+12) = x²+144
Option C is correct :)
15. 13 1/3
16. 2 6/7
Those are the answers for 15 and 16. What you need to do is just use proportions for the similar sides :)