## BethMoses2008 one year ago If f(x)=-3x-1, find f(4)

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1. myininaya

just replace all the x's in f(x)=-3x-1 with 4

2. BethMoses2008

Thanks

3. BethMoses2008

If f(x)=-x2+x divide by x, find f(2)

4. myininaya

5. BethMoses2008

6. myininaya

you should try this one @BethMoses2008 f(2) means to replace all the x's with 2's in f(x)=-x^2+x

7. BethMoses2008

okay thanks

8. myininaya

what did you get when you replaced all the x's with 2's?

@BethMoses2008 Since you know how to do it, can you find the answer?

10. BethMoses2008

Is 4

11. BethMoses2008

4^3+1=65

12. myininaya

ok first step i asked you to do what to replace all the x's with 2's so you have -2^2+2 what is 2^2?

13. BethMoses2008

If f(1) f(x)=4x^3+x, find f(1)

14. BethMoses2008

I think it's 65

15. myininaya

I'm trying to tell you answered incorrectly to the previous one the answer is not 4.

16. myininaya

-2^2+2 is not 4

17. BethMoses2008

It's 3

18. BethMoses2008

Right

19. BethMoses2008

Typ

20. BethMoses2008

21. BethMoses2008

Nevermind

22. BethMoses2008

If f(x)=-2, find f(5)

23. myininaya

well 3 is not the right answer to evaluating -2^2+2 let's try to take it slow you are to apply order of operations there are no grouping symbols so let's do the exponents the exponent is only on the 2 if were to be on the -2 it would look like (-2)^2 but we have -2^2 so first exponents what is 2^2?

24. BethMoses2008

If f(x)=-2, find f(5)

25. myininaya