InsanelyChaotic
Rationalize the denominator
5
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(64sq root 7)  (85sq root 7)



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hartnn
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what have u tried ?

RolyPoly
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First, simplify the denominator:
\[(64\sqrt7)  (85\sqrt7)\]
Add the like terms.

Kelumptus
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There is no denominator....

InsanelyChaotic
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dw:1354942795145:dw

slaaibak
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@Kelumptus there is. it's 5 / radical

InsanelyChaotic
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wow you're telling me all of you guys like math????

RolyPoly
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@Kelumptus The fraction is \[\frac{5}{(64\sqrt7)  (85\sqrt7)}\]

Kelumptus
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Ahhh... i missed the 5 in the question, cheers.

InsanelyChaotic
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dw:1354942881953:dw

hartnn
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what ?

InsanelyChaotic
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Really?!!!!!!!!!!!!!!!! I'm RIGHT?!!!!!!!!!!!!!!!!!!!!

InsanelyChaotic
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Nothing, disregard what's above

hartnn
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yeah, the previous answer was correct...

hartnn
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or were you typing options ? :P

InsanelyChaotic
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I didn't mean to send the one above. thank god!

InsanelyChaotic
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It was work i was doing on my own haha that "post" button is clicking itself eh? ;) jk

hartnn
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oh, wait...you sure there is no sign mistake ?

InsanelyChaotic
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In the answer?

hartnn
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yeah, u sure about your answer ?

InsanelyChaotic
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dw:1354943056191:dw

slaaibak
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\[{5 \over 2 + \sqrt 7} = { {5 \over 2 + \sqrt 7} \times {2  \sqrt 7 \over 2  \sqrt 7}} = { {10 + 5\sqrt 7} \over {3}}\]

hartnn
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yup. thats absolutely correct, just checking that you were sure or not ......

slaaibak
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hartnn that's not correct.

hartnn
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O.o

InsanelyChaotic
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HUH?

slaaibak
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Check my answer for the correct thing.

hartnn
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oh, yes, slaaibak is right,
you missed a 5, @InsanelyChaotic

InsanelyChaotic
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Oh did I???? my error

InsanelyChaotic
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thank you for the heads up!

InsanelyChaotic
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dw:1354943282970:dw

hartnn
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yup.