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Mathematics 9 Online
OpenStudy (anonymous):

simplify -9x/x-x^2

OpenStudy (anonymous):

\[simplify \frac{ -9x }{ x-x^2 }\]

geerky42 (geerky42):

Factor out x in denominator.

OpenStudy (anonymous):

what does that mean though?

geerky42 (geerky42):

\[x - x^2 \rightarrow x(1 - x)\]

OpenStudy (anonymous):

i am still lost

geerky42 (geerky42):

What part don't you understand? Factor x out?

OpenStudy (anonymous):

the whole thing yes

geerky42 (geerky42):

Do you know GCF?

OpenStudy (anonymous):

yes

geerky42 (geerky42):

What is GCF of (x-x²) ?

OpenStudy (anonymous):

1 i think right

geerky42 (geerky42):

Right, but there is more.

geerky42 (geerky42):

what does both x and x² share?

OpenStudy (anonymous):

1x

geerky42 (geerky42):

Yeah, x. so factor x out. x-x² -> x(1-x) Do you follow?

OpenStudy (anonymous):

i believe so does that mean it would be x(1-x)

geerky42 (geerky42):

yeah exactly

OpenStudy (anonymous):

so to simplify it would be \[\frac{ 9 }{ x-1 }\]

geerky42 (geerky42):

Yes! you got it!

OpenStudy (anonymous):

ok ya thanks alot

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