00:01
Okay, so what is f at negative 3? well, what i'm doing here is i'm replacing each x value with negative 3.
00:06
So, parentheses, negative 3 squared plus 2 times negative 3.
00:11
Negative 3 times negative 3 is negative 3 squared.
00:14
Negative times negative is a positive 9 plus 2 times negative 3 is 6.
00:17
So this will be positive 3 at the end of the day.
00:20
Okay.
00:21
What is f at a? well, instead of replacing x with a number, this would just be a squared plus 2 times a.
00:30
Right.
00:31
Can i combine these terms? no, because this has a squared, this doesn't.
00:34
So this is just my final answer.
00:36
What about f of negative x.
00:40
Okay...