Question

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

Answer 1

@Mertsj can u help?

Answer 2

@tcarroll010 can u help?

Answer 3

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.

Answer 4

okay can u show it?

Answer 5

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.

Answer 6

okay

Answer 7

let me try

Answer 8

so for the first i got 15x + 3

Answer 9

That is good so far. So continue.

Answer 10

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

Answer 11

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.

Answer 12

okay

Answer 13

so its 15x + 10 right?

Answer 14

You have -5 times 3x There is a negative sign involved. Always check your signs.

Answer 15

so -15x + 10

Answer 16

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.

Answer 17

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

Answer 18

You got it! Great job! :-)

Answer 19

thanks!

Answer 20

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