Answer:
We conclude that:

Step-by-step explanation:
Given the expression

Rewrite
as 
so

Apply difference of two squares formulas:

so

∵
,
Therefore, we conclude that:

Answer:
Step-by-step explanation:
A, and B
Suppose the original function equation is y=kx+b
New equation is y=k(x-4)+b-9
Answer:
x = 5, -3
Step-by-step explanation:
f(x) = x²-2x-15
f(x) = (x-5)(x+3)
x = 5, -3