Question

photo attached. please help.
this is i got so far

Answer 1

SET THE DERIVATIVE OF EQUATION = 0

Answer 2

derivative
18x^2-54x-180

Answer 3

18^2-54-180=0?

Answer 4

solve for x, whatever x-values you got are the critical numbers...

Answer 5

ya

Answer 6

btw what site is it, i wanna practice some too.

Answer 7

this is online-homework. I dont think you can go on at least teacher make one

Answer 8

site>?

Answer 9

webwork

Answer 10

so How do i solve x?

Answer 11

do i use quadartic

Answer 12

.com?

Answer 13

yes

Answer 14

just google it and enter webwork

Answer 15

not openening...and yes factor out 18 and then solve it...

Answer 16

http://webwork.maa.org/

Answer 17

factor 18?