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Mathematics 7 Online
OpenStudy (anonymous):

please help!!!!!!!!!! attachment below :) thank you Explain, in complete sentences, how you would multiply the following expression: Write the simplified answer in radical form

OpenStudy (anonymous):

OpenStudy (anonymous):

sorry i can't help you with this one so sorrrry

jimthompson5910 (jim_thompson5910):

first convert to rational exponent form

jimthompson5910 (jim_thompson5910):

do you know how to do that?

OpenStudy (anonymous):

NO

OpenStudy (anonymous):

(a)^m (a)^n=a^(m+n)

jimthompson5910 (jim_thompson5910):

In general, \[\Large \sqrt[n]{x^m} = x^{m/n}\]

jimthompson5910 (jim_thompson5910):

so \[\Large \sqrt[12]{x^5} = x^{5/12}\]

OpenStudy (anonymous):

oh, wow thank you..

jimthompson5910 (jim_thompson5910):

you use this idea to convert each expression to have rational exponents, then you use the rule ktnguyen1 wrote out

OpenStudy (anonymous):

that doesn't help me, sorry...

jimthompson5910 (jim_thompson5910):

how would you convert \[\Large \sqrt[6]{x}\] to rational exponent form?

OpenStudy (anonymous):

one sec

jimthompson5910 (jim_thompson5910):

ok

OpenStudy (anonymous):

6x?

jimthompson5910 (jim_thompson5910):

no

jimthompson5910 (jim_thompson5910):

\[\Large \sqrt[6]{x} = \sqrt[6]{x^1}\]

jimthompson5910 (jim_thompson5910):

now use the rule \[\Large \sqrt[n]{x^m} = x^{m/n}\]

OpenStudy (anonymous):

the only example i can think of right now is: 3√ 64 (assuming you mean the cube root of 64) is equal to (64)^(1/3)

jimthompson5910 (jim_thompson5910):

so using this example, we can say \[\Large \sqrt[6]{x} = x^{1/6}\]

OpenStudy (anonymous):

oh... I understand that now!!!!!!!! :))))

jimthompson5910 (jim_thompson5910):

so \[\Large \sqrt[12]{x^5} \cdot \sqrt[6]{x} \] is the same as \[\Large x^{5/12} \cdot x^{1/6} \]

jimthompson5910 (jim_thompson5910):

now multiply those two expressions

jimthompson5910 (jim_thompson5910):

\[\Large x^{5/12} \cdot x^{1/6} = ?\]

OpenStudy (anonymous):

one sec:)

OpenStudy (anonymous):

ps thank you for your time

jimthompson5910 (jim_thompson5910):

yw

OpenStudy (anonymous):

5/72

OpenStudy (anonymous):

is that right?

jimthompson5910 (jim_thompson5910):

you add the exponents, not multiply them

OpenStudy (anonymous):

what???? are you serious??

jimthompson5910 (jim_thompson5910):

yes

OpenStudy (anonymous):

oh my god i suck at math.

jimthompson5910 (jim_thompson5910):

no you don't

OpenStudy (anonymous):

could've sworn it was multiplying

jimthompson5910 (jim_thompson5910):

it's just kinda counter-intuitive to add the exponents when you multiply the two expressions, that's all

OpenStudy (anonymous):

6/18

jimthompson5910 (jim_thompson5910):

5/12 + 1/6 5/12 + 2/12 7/12

jimthompson5910 (jim_thompson5910):

remember the denominators must be the same (and they don't change when you add)

OpenStudy (anonymous):

it is counterintuitive.....

jimthompson5910 (jim_thompson5910):

definitely

OpenStudy (anonymous):

give me just one sec! brb

jimthompson5910 (jim_thompson5910):

ok

OpenStudy (anonymous):

back

OpenStudy (anonymous):

how can you make sure the denominators are the SAme/

OpenStudy (anonymous):

same?*

jimthompson5910 (jim_thompson5910):

to go from 1/6 to 2/12, you multiply top and bottom by 2

OpenStudy (anonymous):

just by adding the problem, it'll automatically be the same denominator?

OpenStudy (anonymous):

oh, okay

jimthompson5910 (jim_thompson5910):

i want to make all the denominators the same, since the LCM of 6 and 12 is 12, the common denominator is 12

OpenStudy (anonymous):

gotcha :)

OpenStudy (anonymous):

youre good at this

jimthompson5910 (jim_thompson5910):

thanks

OpenStudy (anonymous):

thank you for your undivided attention...seriously..

jimthompson5910 (jim_thompson5910):

you're welcome

OpenStudy (anonymous):

youre lucky math is your strongest

OpenStudy (anonymous):

English is mine

jimthompson5910 (jim_thompson5910):

I've just had a lot of practice

OpenStudy (anonymous):

Do you really enjoy this?

jimthompson5910 (jim_thompson5910):

give it more time and you'll get better

jimthompson5910 (jim_thompson5910):

yes

OpenStudy (anonymous):

Why, if I may ask?

jimthompson5910 (jim_thompson5910):

hmm idk why, i just do

OpenStudy (anonymous):

It just clicks?

jimthompson5910 (jim_thompson5910):

yeah i guess so

OpenStudy (anonymous):

So does English, for me

jimthompson5910 (jim_thompson5910):

i guess i could ask the same about you and english

jimthompson5910 (jim_thompson5910):

i gotcha

OpenStudy (anonymous):

I enjoy reading. The answer doesn't have to be one specific thing. I can easily see myself apply English work to my everyday life.

jimthompson5910 (jim_thompson5910):

i can see that happening too, there are a lot of places where english could be applied

OpenStudy (anonymous):

Such as right now hahaha

OpenStudy (anonymous):

It's funny though, English isn't my native language

jimthompson5910 (jim_thompson5910):

no? i guess being on the outside looking in gives you an advantage in many ways

jimthompson5910 (jim_thompson5910):

i know i didn't learn the semantics and syntax of language until I learned spanish (forgot most of it though lol)

OpenStudy (anonymous):

I suppose it does. I suppose having to drill the language the year you came into the country has a large part of it as well ;)

jimthompson5910 (jim_thompson5910):

yeah definitely, more than part of it...gotta know it to survive

OpenStudy (anonymous):

you're great for being so kind

OpenStudy (anonymous):

Russian's my initial language

jimthompson5910 (jim_thompson5910):

oh that's very cool, do you use it a lot?

OpenStudy (anonymous):

Not at all unfortunately. I was fluent, came to the US when I was four, and had forgotten the entire language due to me not being surrounded by Russian speaking beings.

jimthompson5910 (jim_thompson5910):

oh so you've learned english at a young age then (probably the best time to learn), i gotcha

jimthompson5910 (jim_thompson5910):

but who knows, you might use it again someday

OpenStudy (anonymous):

It's hardly noticeable, though, that English isn't my native language, that is. But sometimes I'll catch myself pronouncing words a tad but differently from the ones around me.

OpenStudy (anonymous):

Exactly :)

OpenStudy (anonymous):

No one else really realizes it; it's mostly something I catch onto every now and again.

jimthompson5910 (jim_thompson5910):

that happens to me all the time too, but I usually do that so I can spell them correctly

jimthompson5910 (jim_thompson5910):

besides, no one sounds the same no matter where you go, so you're fine

OpenStudy (anonymous):

:) you are too

jimthompson5910 (jim_thompson5910):

thanks

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