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looks good to me. want the computation?

can you work this problem out?

well except it is not what i get

bare with me, i going write i have so far

let me try again and make sure i have it correct

C(x) = 0.0439x3 – 1.4911x2 + 14.224x + 41.76

so what you do is, substract 81 from 41.79

\[C(x)=.0439x^3-1.4991x^2+14.224x+41.76\] is that right?

i mean before you subtract is that correct?

yes that would be correct. if C(9) = 81

9] 0.0439 -1.4911 +14.224 -39.28

but it doesn't seem to be according to my calculation let me check again

no the first question

when you do syntethic division, you get 0

then you are correct!

and teh giving you an extreme equation, and know you can find both root,
0.0439^2-1.096x+8.36

you did the syntethinc division, and you got 0, correct?

you did the syntethinc division, and you got 0, correct?

you did the syntethinc division, and you got 0, correct?

must be typing something in wrong because i do not get zero

ok , type what you doing

close, but i get C(9)=-.04 but that is probably close enough.
you get 0 exactly?

so you get 0?

close to 0 , is not enough..

ooho i see

41.76-81=-39.24 not -39.28

le't try it again, 9] 0.0439 -1.4911 +14.224 +39.28

last number should be 39.24

use your calculator, i dont knohere mine is

then it will work

i did and it works

oh good, oh graph, yeah is -39.24, i thought it was an 8

whew. then you get 0 i checked already

get \[0.04390*x^2-1.096x+4.36\]

yeah, now what, guadratic formula?

yes what a pain. hold on and i will cheat if you like

lol

ikr, better then factoring at least...

looks like x=20 or x = 4.966 rounded

a miracle. 20 is exact!

so going back to the problem, those are the root, you did quadratic formula?lol

we must bei n the right tract

so it must factor as \[(x-20)(.0439x-.218)\]

no i didn't use the quadratic formula because i would have no patience for that

i used maple

lol, so wee know both root that were missing, the is really the aswner?

yup that is it

just changing them to word, and the will do it, thx man.

good luck

oh crap, we are not,done, remember it ask you in qhat yesterday,

oh crap, we are not,done, remember it ask you in qhat yesterday,

oh crap, we are not,done, remember it ask you in qhat yesterday,

oh crap, we are not,done, remember it ask you in qhat yesterday,

oh crap, we are not,done, remember it ask you in qhat yesterday,

lol, lagg, year*

lol, lagg, year*

you still here?