# Given f(x) = -x^2 + 3x -6, find f(-3).

• Sep 7th 2011, 06:09 PM
WannaBSmart
Given f(x) = -x^2 + 3x -6, find f(-3).
Given f(x) = -x^2 + 3x -6, find f(-3).

May I please have some guidance with this problem? Been at it a good 15 minutes and still don't know what to do.

What I did was (-3)^2 + -9 -6 and got the answer of -6. I know that the correct answer is -24.. but how?
• Sep 7th 2011, 06:13 PM
Sudharaka
Re: Given f(x) = -x^2 + 3x -6, find f(-3).
Quote:

Originally Posted by WannaBSmart
May I please have some guidance with this problem? Been at it a good 15 minutes and still don't know what to do.

What I did was (-3)^2 + -9 -6 and got the answer of -6. I know that the correct answer is -24.. but how?

The highlighted part should be, -(-3)^2 + (-9) -6

.
• Sep 7th 2011, 06:15 PM
WannaBSmart
Re: Given f(x) = -x^2 + 3x -6, find f(-3).
Quote:

Originally Posted by Sudharaka
.

If I could kiss you I would. I think this is going to be a forum that I'm going to frequent. Thanks for the help.
• Sep 7th 2011, 06:41 PM
TheBoss
Re: Given f(x) = -x^2 + 3x -6, find f(-3).
Quote:

Originally Posted by Sudharaka
.

Would what he said make it easy to solve?
• Sep 9th 2011, 05:41 AM
CaptainBlack
Re: Given f(x) = -x^2 + 3x -6, find f(-3).
Quote:

Originally Posted by TheBoss
Would what he said make it easy to solve?

Sudharaka's edit to the quoted post contains corrections or what is in red in blue at the bottom.

CB