Answer:
1a: f(-2) means substituting -2 for x
1b: 65
I don't know the second one
It is 6 because 6x6x6=216
Answer:

<h2>HOPE U UNDERSTOOD</h2>
PLEASE MARK AS BRAINLIEST ONE✌
ALL THE BEST FOR YOU
COMMENT PLEASE FOR ANY DOUBTS.
Use pothomath that app is good
For math