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Algebra 13 Online
OpenStudy (anonymous):

what is the simplest form of the expression ?

OpenStudy (anonymous):

OpenStudy (anonymous):

OpenStudy (anonymous):

@mathmath333 help?

OpenStudy (anonymous):

@xapproachesinfinity help please ?

OpenStudy (xapproachesinfinity):

you need rationalize the denominator by multiplying both top and bottom by \(\huge \sqrt{3}+\sqrt{9}\) the conjugate

OpenStudy (anonymous):

that's all i have to do ?

OpenStudy (mathmath333):

\(\large \begin{align} \color{black}{\dfrac{\sqrt 3-\sqrt 6}{\sqrt 3+ \sqrt6} \hspace{.33em}\\~\\ =\dfrac{\sqrt 3-\sqrt 6}{\sqrt 3+ \sqrt6}\times \dfrac{\sqrt 3-\sqrt 6}{\sqrt 3- \sqrt6} \hspace{.33em}\\~\\ }\end{align}\) simplify this

OpenStudy (xapproachesinfinity):

i mean \(\huge \sqrt{3}+\sqrt{6}\)

OpenStudy (anonymous):

ok

OpenStudy (xapproachesinfinity):

i'm drunk @mathmath333 has it the right i did the opposite lol

OpenStudy (xapproachesinfinity):

not focused now!!

OpenStudy (anonymous):

lol okay thanks for the help

OpenStudy (anonymous):

it keep saying invalid input on my calculator

OpenStudy (xapproachesinfinity):

oh no if you dont have advanced calc you can do it with simple calc' you need to do it by hand my friend otherwise what;s the point of this

OpenStudy (anonymous):

,its -3-2 sqrt18/9 ?

OpenStudy (xapproachesinfinity):

what is \(\huge (\sqrt{3}+\sqrt{6})(\sqrt{3}-\sqrt{6})=?\) recall \(\huge (a+b)(a-b)=a^2-b^2\) difference of two squares

OpenStudy (xapproachesinfinity):

for the top you neeed to do some foiling

OpenStudy (anonymous):

foiling ???

OpenStudy (anonymous):

oh nevermind i got it hold on

OpenStudy (xapproachesinfinity):

like what you do with \((a+b)(a+b)=a.a+ab+ba+b.b=a^2+2ab+b^2\)

OpenStudy (anonymous):

sqrt 3-sqrt6/sqrt3+sqrt6=(sqrt 3-sqrt 6)(sqrt 3-6)/(sqrt3+sqrt6)(sqrt3-sqrt6) (sqrt3-sqrt6)^2/3-6=(3-2sqrt18+6)/-3 =(9-2*3sqrt 2)/3 =(9-6sqrt2)/-3 (reduce) =-3+2sqrt2=2sqrt2-3 < answer should be answer c then

OpenStudy (xapproachesinfinity):

yes that's good

OpenStudy (xapproachesinfinity):

good job there sorry i had to go check my cooking hehe

OpenStudy (anonymous):

kay

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