## anonymous 3 years ago please

1. anonymous

Let f(x) = x + 7 and g(x) = x – 2. What is f(x) • g(x)?

2. anonymous

You're told f(x)= x+7. That means that x+7 is the same as f(x). Same goes for g(x). So when they're asking you to multiply f(x) with g(x), what would you replace as f(x) and g(x)?

3. anonymous

7 and -2?

4. anonymous

Is 7 the same as f(x). What did I say is equal to f(x)?

5. anonymous

x+7

6. anonymous

So what would you replace as f(x)?

7. anonymous

x+7? or 7x?

8. anonymous

where'd you get 7x from?

9. anonymous

Math is all about being realistic. If you did't know where you got 7x, then why would you even bring it out into thin air?

10. anonymous

didn't*

11. anonymous

x+7 is correct.

12. anonymous

What would you replace g(x) then?

13. anonymous

x-2

14. anonymous

and sorry..im really horrible at math so i honestly didnt know...goodness lol

15. anonymous

Okay that's correct though even if you're horriblea t math. You got it.

16. anonymous

horrible at*

17. anonymous

so then using what you just knew about f(x) and g(x): $f(x)\times g(x)=?$

18. anonymous

-14?

19. anonymous

You didn't say anything about -14 beforehand, why now?

20. anonymous

I'm just asking you to repeat what you said last time about what f(x) and g(x) is.

21. anonymous

well because idk why i didnt..

22. anonymous

ok, that make sense i think. ok so if i got this right my answer would be x^2 + 5x – 14

23. anonymous

Wowza, That's awesome! See, if you're actually thinking straight, you can do amazing things. That's absolutely correct!

24. anonymous

why thank you :)