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## Esmy 3 years ago Evaluate the function for the given value of x. If you can explain how you got the answer that would be great! :D f(x) = -6x2 - 4x - 4 , x = - 2

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1. hartnn

directly put x=-2 f(-2)= -6 (-2)^2 -4(-2) -4 now (-2)^2 = (-2)(-2) =4 4(-2)=-8 so, f(-2) =-6(4)-(-8)-4 =-24+8-4 i think u can solve further

2. Rohangrr

|dw:1348382774561:dw|

3. Esmy

so f( - 2) = -20

4. hartnn

yup.

5. Esmy

the 20 has a negative sign its not positive

6. hartnn

yes, its -20 only.

7. Esmy

Okay yeah I see I was like It can't be positive 20. :D

8. jwheele1

Do you understand?

9. Esmy

Yes I do actually thats why I was like this can't be positive 20 lol

10. jwheele1

ok, great. Just wanted to make sure before I left this area. =)

11. jwheele1

I'll leave you all with this: http://www.khanacademy.org/math/algebra/quadtratics

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