I’m pretty sure the answer is -1
Answer:
I don't know....... sorry.............
Answer: the vertex would be (4,-25)
Step-by-step explanation:
id suggest using desmos. its an app/website and is super helpful.
I have absolutely no idea goodluck with that
Now the reasoning of me not knowing is because my brain capacity is very low im just tryna get points I hope you find out the answer to that question good day sir
Answer:

Step-by-step explanation:
Hello,


It means that

And we know that

So we got two equations

For 
For 
I assume that we are after two different roots so the solution for p is p=-11
b) 
So a quadratic equation with the expected roots is

Hope this helps.
Do not hesitate if you need further explanation.
Thank you