Answer:

Step-by-step explanation:
A quadratic expresion is of the form

where

The give options are:




From the given options, the only expression which is quadratic is

where a =5, b=9 and c=-1
Therefore the correct choice is the second option.
Answer:
if you divide 15 by 6 you should get 2.5 as your answer
About 12,000 I’m not sure but I searched it up and it says that
Answer:
the first one.
Step-by-step explanation: