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Mathematics 16 Online
OpenStudy (anonymous):

MEDAL I JUST NEED THE ANSWER WILL POST QUESTION

OpenStudy (anonymous):

OpenStudy (bibby):

division = multiplication by the reciprocal. start by flipping the right hand side next, factor the stuff in parentheses

OpenStudy (anonymous):

so i flip the right side and it becomes multiplication then what?

OpenStudy (campbell_st):

factor both numerators and denominators

OpenStudy (bibby):

I didn't mean to distribute it just yet

OpenStudy (anonymous):

dang it

OpenStudy (anonymous):

yeah i don't know how to factor it

OpenStudy (bibby):

btw the stuff in parentheses are m's not n's :p

OpenStudy (bibby):

\(\large \frac{5n^2\color{red}{(m^2+2m-3)}}{10n(m^2-3m+2))}\times\frac{4n^2(m^2-8m+12)}{n^2(m^2-3m-18)}\) start with the red

OpenStudy (anonymous):

m?

OpenStudy (anonymous):

I don't understand this problem at all this is the first time I've come across a problem like this

OpenStudy (bibby):

that's weird. so you can't factor \((m^2+2m-3)\)? rewrite it as (m+?)(m-?)

Nnesha (nnesha):

find two number if you multiply them you should get -3 and if you add or subtract them you should get positive 2

OpenStudy (anonymous):

(m+3)(m-1)

Nnesha (nnesha):

that's right :)

OpenStudy (anonymous):

ok thank you that helps, so after i factor it THEN i distribute?

Nnesha (nnesha):

if you distribute u gonna get same thing

OpenStudy (bibby):

nope. then you cancel what you can

OpenStudy (bibby):

distributing would make things very ugly. if you notice, they're not even the same letters

OpenStudy (anonymous):

ohhh i see

Nnesha (nnesha):

yeah^

OpenStudy (anonymous):

ok hold on I will try factoring it

OpenStudy (anonymous):

\[\frac{ 5n^2(m+3)(m-2) }{ 10n(m-1)(m-2) } \times \frac{ 4n^2(m-2)(m-6) }{ n^2(m+3)(m-6) }\]

OpenStudy (anonymous):

i could cancel out the (m-2) and the (m-6) right?

OpenStudy (anonymous):

wait nope i copied it down wrong

OpenStudy (anonymous):

should be (m-1)

Nnesha (nnesha):

yes left side top part its ( m -1) not (m -2)

OpenStudy (anonymous):

yeah i know i just typed it out wrong i have it the right way on my paper

OpenStudy (bibby):

also the m+3s

OpenStudy (bibby):

\(\large \frac{ 5n^2\cancel{(m+3)}\cancel{(m-1)} }{ 10n\cancel{(m-1)}(m-2) } \times \frac{ 4n^2(m-2)\cancel{(m-6)} }{ n^2\cancel{(m+3)}\cancel{(m-6)} }\)

Nnesha (nnesha):

hmmmmmmmm

OpenStudy (bibby):

wait is the top right, correctly factored

OpenStudy (anonymous):

it should be..

Nnesha (nnesha):

yes right -6 times -2 = 12 and -2 =-8 yeah looks good

OpenStudy (bibby):

oh, I was looking at the original division thing

OpenStudy (bibby):

forgot we flipped it

OpenStudy (anonymous):

so am I left with ? \[\frac{ 5n^2 }{ 10n } \times \frac{ 4n^2 }{ n^2 }\]

OpenStudy (bibby):

yeah. you can cancel an n^2 and simplify 5/10

OpenStudy (anonymous):

whoops

OpenStudy (anonymous):

\[\frac{ 2n^2 }{ 5n } \times 4\]

OpenStudy (bibby):

5/10=1/2

OpenStudy (anonymous):

oh yeah whoops haha thats basic math

OpenStudy (anonymous):

i am ashamed

OpenStudy (anonymous):

so is 2n my answer?

OpenStudy (bibby):

|dw:1422083833490:dw| yeah

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