Answer:
is sometimes positive and sometimes negative.
Step-by-step explanation:

Take 

Take 

Hence
for
and
for 
So
is sometimes positive and sometimes negative in the interval.
C. formula
I hope this helps, thank you.
Answer is going to be x>-19
Answer:
12144.
Step-by-step explanation:
(self-explanatory)
I hope this helped, have a nice day.