onegirl
Simplify the numerator. You should get just 13. Show your work. f'(x) = 3(5x + 1) + -5(3x - 2) over (5x + 1)^2
Delete
Share
This Question is Closed
onegirl
Best Response
You've already chosen the best response.
0
@Mertsj can u help?
onegirl
Best Response
You've already chosen the best response.
0
@tcarroll010 can u help?
tcarroll010
Best Response
You've already chosen the best response.
1
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.
onegirl
Best Response
You've already chosen the best response.
0
okay can u show it?
tcarroll010
Best Response
You've already chosen the best response.
1
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.
onegirl
Best Response
You've already chosen the best response.
0
okay
onegirl
Best Response
You've already chosen the best response.
0
let me try
onegirl
Best Response
You've already chosen the best response.
0
so for the first i got 15x + 3
tcarroll010
Best Response
You've already chosen the best response.
1
That is good so far. So continue.
onegirl
Best Response
You've already chosen the best response.
0
ok so i gto 15x + 3 + -5x + 10 what do i do next?
tcarroll010
Best Response
You've already chosen the best response.
1
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.
onegirl
Best Response
You've already chosen the best response.
0
okay
onegirl
Best Response
You've already chosen the best response.
0
so its 15x + 10 right?
tcarroll010
Best Response
You've already chosen the best response.
1
You have -5 times 3x There is a negative sign involved. Always check your signs.
onegirl
Best Response
You've already chosen the best response.
0
so -15x + 10
tcarroll010
Best Response
You've already chosen the best response.
1
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.
onegirl
Best Response
You've already chosen the best response.
0
ok so -15x and 15x will cancel and we will combine 10 and 3 to get 13 :)
tcarroll010
Best Response
You've already chosen the best response.
1
You got it! Great job! :-)
onegirl
Best Response
You've already chosen the best response.
0
thanks!
tcarroll010
Best Response
You've already chosen the best response.
1
uw! Thanks for the recognition! Good luck in all of your studies! @onegirl