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pooja195 (pooja195):
does the 3 have a sign?
Nnesha (nnesha):
\[\huge\rm 2n^3 = 200n\] like this right ??
Nnesha (nnesha):
if yes then subtract 200n both side and let me know what you get
OpenStudy (anonymous):
Oh sorry, yes.
OpenStudy (anonymous):
I got \[2n^3-200n=0\]
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Nnesha (nnesha):
yes right now find GCF(greatest common factor)
OpenStudy (anonymous):
Then I divided 2 by both sides and I got \[n^3-100n=0\]
OpenStudy (anonymous):
I factored out an "n" and I got \[n(n^2-50)=0\]
and because \[(n^2-50) \] my final answer was n(n+25)(n-25)=0. So I set them all to zero and I got:
n=0
n+25=0 => n=-25
n-25=0 => n=25
Nnesha (nnesha):
how did you get 50?
OpenStudy (anonymous):
But for some reason the website where I do my homework tells me its wrong
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OpenStudy (anonymous):
because I divided \[2n^3-200n\] by 2
Nnesha (nnesha):
oky right so -200 divide by 2 is what
Nnesha (nnesha):
\(\color{blue}{\text{Originally Posted by}}\) @Crazy.c.246
Then I divided 2 by both sides and I got \[n^3-100n=0\]
\(\color{blue}{\text{End of Quote}}\)
that's what you got after dividing by 2
OpenStudy (anonymous):
yes
Nnesha (nnesha):
yes so then tha is not 50
first you have to subtract then you get |dw:1425792541421:dw|