Directions: Given g(x) = x squared -x, find the following values of g.
1. g(-3)
2. g(3)
3. g(-2)
4. g(0)
5. g(-1)
6. g(1)
Could you please explain me how to do this? My teacher was out of town, and we had a substitute, so the substitute didn't know what this "thing" was.
You don't have to do all of them, but at least one would be nice (like a walkthough).
If you did all of them, I wouldn't learn anything!
Thanks in advance!
2007-11-27 13:06:32 · 3 answers · asked by The Guru 3 in Education & Reference ➔ Homework Help
g(x) = x^2 - x
g(-3) = (-3)^2 - (-3)
g(-3) = 9 + 3
g(-3) = 12
Wherever there is an x, replace it with the number in parentheses. Read this as "g of x equals x squared minus x. Find g of negative three...." etc.
These are functions. In my example, -3 is your "input" (which is your x-variable) and it "outputs" 12 (which is your y-variable). You have a coordinate at (-3, 12), which you could plot on a coordinate plane.
I am assuming at this point that you know what a function is. Let me know if you don't!
2007-11-27 13:12:53 · answer #1 · answered by Sage B 4 · 0⤊ 0⤋
All you do is plug in the given number SO:
g(-3)=(-3squared) - -3
g(-3)= 9 + 3
g(-3)= 12
Get it? Hope so! squaring a negative makes it a positive. minusing a negative makes it a plus (9 - -3 is the same as 9 +3)
Hope that helps!!!
2007-11-27 13:13:09 · answer #2 · answered by Inlove 3 · 0⤊ 0⤋
g(x) = x^2 -x
Substitute the number for x
1. g(-3) = (-3)^2 -(-3) = 9 + 3 = 12
2. g(3) = (3)^2 -(3) = 9 - 3 = 6
That's how to do it.
2007-11-27 13:13:41 · answer #3 · answered by Steve A 7 · 0⤊ 0⤋