Question

help again ...

Answer 1

I'm here for ya

Answer 2

So you're in calculus right?

Answer 3

yep

Answer 4

Derive the function

Answer 5

3x^2-12x

Answer 6

-3x^2 -12x

Answer 7

But from here on out take out a common factor of -3x

Answer 8

So it would be -3x(x+4)

Answer 9

would u make it -3x^@(x+4)

Answer 10

3x^2(x+4)

Answer 11

No no just 3x because you can't pull out another x from 12x

Answer 12

o ok

Answer 13

would you put it to zero ?

Answer 14

Equate it to 0, yes you would

Answer 15

So you have x+4=0

Answer 16

x=-4

Answer 17

so it would be decreasing

Answer 18

No, not exactly. X=-4 is the critical point where the function is not decreasing or increasing

Answer 19

so how know if the graphg is increasing or decreasing

Answer 20

graph

Answer 21

So if you graph it and you look at the graph of the derivative which is x+4

Answer 22

On which interval is x+4 above the x axis or positive is where the function is increasing

Answer 23

when i graphed it i was negative

Answer 24

i think im doing it wrong

Answer 25

You graphed x+4?

Answer 26

yeah i graohed it but now i think it increasing

Answer 27

graphed

Answer 28

If you look at the graph above you see that the graph is positive for every value above x=-4