6x-18
you pretty much h just multiply both the first part of the parentheses by the number outside, then the second :)
Answer:
79
Step-by-step explanation:
So we have the function:

To find g(9), substitute 9 for t. Thus:

Square:

Subtract:

So, our answer is 79.
And we're done!
Answer:
-7r^2+12r-8
Step-by-step explanation: