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onegirl

  • one year ago

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

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  1. onegirl
    • one year ago
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    @Mertsj can u help?

  2. onegirl
    • one year ago
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    @tcarroll010 can u help?

  3. tcarroll010
    • one year ago
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    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
    • one year ago
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    okay can u show it?

  5. tcarroll010
    • one year ago
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    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
    • one year ago
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    okay

  7. onegirl
    • one year ago
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    let me try

  8. onegirl
    • one year ago
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    so for the first i got 15x + 3

  9. tcarroll010
    • one year ago
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    That is good so far. So continue.

  10. onegirl
    • one year ago
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    ok so i gto 15x + 3 + -5x + 10 what do i do next?

  11. tcarroll010
    • one year ago
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    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
    • one year ago
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    okay

  13. onegirl
    • one year ago
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    so its 15x + 10 right?

  14. tcarroll010
    • one year ago
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    You have -5 times 3x There is a negative sign involved. Always check your signs.

  15. onegirl
    • one year ago
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    so -15x + 10

  16. tcarroll010
    • one year ago
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    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
    • one year ago
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    ok so -15x and 15x will cancel and we will combine 10 and 3 to get 13 :)

  18. tcarroll010
    • one year ago
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    You got it! Great job! :-)

  19. onegirl
    • one year ago
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    thanks!

  20. tcarroll010
    • one year ago
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    uw! Thanks for the recognition! Good luck in all of your studies! @onegirl

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