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Mathematics 8 Online
OpenStudy (anonymous):

i have five problems i have been trying to get help with since last night can anybody please look at them work them out and show me how they are done?

OpenStudy (anonymous):

OpenStudy (anonymous):

\[ \dfrac{(9\sqrt[3]{4} -6\sqrt[3]{4})} {\sqrt[3]{729}}\] Is this the first one?

OpenStudy (anonymous):

i will post each one separately here ok

OpenStudy (anonymous):

No, not all here, as separate questions, each with own thread. Is the above correct for the first one, we will do that one in here.

OpenStudy (anonymous):

no i will correct it for you

OpenStudy (anonymous):

This is the tex if you want to correct that instead.. \dfrac{(9\sqrt[3]{4} -6\sqrt[3]{4})} {\sqrt[3]{729}}

OpenStudy (anonymous):

\[9\sqrt[3]{4}-6\sqrt[3]{4} subtract and simplify\]

OpenStudy (anonymous):

Ok, let me look...

OpenStudy (anonymous):

OK, I think your are letting the radicals get u confused, the same expression is in both terms so you can factor it out just as you would do with a normal equation: \[\sqrt[3]{4} (9-6) = 3 \sqrt[3]{4}\]

OpenStudy (anonymous):

they look so much alike

OpenStudy (anonymous):

The cube root of 4 can't be more simplified so you can just think of it as "x". 9x -6x = 3x

OpenStudy (anonymous):

ok then what

OpenStudy (anonymous):

Well, that 's the first question done, right? I saw you posted something else but the format is docx, I can't read it.

OpenStudy (anonymous):

i will post the next one sec ty for your help i didnt mean to seem testy

OpenStudy (anonymous):

Is the next question cube root of 729?

OpenStudy (anonymous):

yes

OpenStudy (anonymous):

Might as well do that one, it's 9. Do you have a calculator?

OpenStudy (anonymous):

yes i do but im not sure how to do them on it

OpenStudy (anonymous):

Ok, do you have a little symbol on your calculator looks like \[x^y\]

OpenStudy (anonymous):

It's above X on mine...

OpenStudy (anonymous):

next to another one looks like\[x^{\frac{1}{y}}\]

OpenStudy (anonymous):

It's really easy once u know....

OpenStudy (anonymous):

im sure i will need to post the next couple they are pretty large

OpenStudy (anonymous):

Is number 3 (3 root 3 - 9 root 5)*(2 root 3 + 6 root 5)?

OpenStudy (anonymous):

OK, don't know where u have gone, if it is like above, answer is -252. Now u should post the other questions 1 by 1.

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