## onegirl 2 years ago Simplify the numerator. You should get just 13. Show your work. f'(x) = 3(5x + 1) + -5(3x - 2) over (5x + 1)^2

1. onegirl

@Mertsj can u help?

2. onegirl

@tcarroll010 can u help?

3. tcarroll010

Use the distributive property on: 3(5x + 1) + -5(3x - 2) Which is your numerator. a(c + d) = ac + ad You will get 2 terms that will cancel and 2 other terms that can be combined.

4. onegirl

okay can u show it?

5. tcarroll010

That is now for you to show it. You should show your work now instead of me because that is sufficient help for you to at least start to try to solve it. Go ahead now. It's your problem so take ownership and do some work.

6. onegirl

okay

7. onegirl

let me try

8. onegirl

so for the first i got 15x + 3

9. tcarroll010

That is good so far. So continue.

10. onegirl

ok so i gto 15x + 3 + -5x + 10 what do i do next?

11. tcarroll010

You did well on the first half, but: -5(3x - 2) is not equal to -5x + 10 the "10" is right but concentrate on the "-5x". That is where you went wrong a little bit.

12. onegirl

okay

13. onegirl

so its 15x + 10 right?

14. tcarroll010

15. onegirl

so -15x + 10

16. tcarroll010

Yes. So, your numerator is : 15x + 3 + -15x + 10 so far. So now, 2 of the terms will cancel and the other 2 can be combined.

17. onegirl

ok so -15x and 15x will cancel and we will combine 10 and 3 to get 13 :)

18. tcarroll010

You got it! Great job! :-)

19. onegirl

thanks!

20. tcarroll010

uw! Thanks for the recognition! Good luck in all of your studies! @onegirl