mmbuckaroos
cubed root of (8x^9)....
I have 2x^?



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mmbuckaroos
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dw:1327286055825:dw

mark_o.
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(8x^9)^1/3 =2x^3

mmbuckaroos
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so you just take the square root of the nine

mark_o.
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take the cube root of 8 that is 2 and the x power of 9 divided by 1/3 power=3

mmbuckaroos
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oh ok thank you

mark_o.
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i mean multiplied by 1/3 or divided by 3

mark_o.
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yw

mmbuckaroos
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so what do you do if it says the cubed root of say 2? what is that then?

mark_o.
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ok cube root of 2=2^(1/3) if you use a calculator =1.2599

mmbuckaroos
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ok thanks I'm not really sure how to do this hw I have lol so Im just trying to piece it all together thank you!

mark_o.
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dw:1327286991080:dw

mark_o.
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1.2599(1,2599)(1.2599)=1.2599^3 =2

mmbuckaroos
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dw:1327287288675:dw

mark_o.
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a god example is cube root of 8 that is (8)^1/3=2
to check this (2)x(2)x(2)=8

mark_o.
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(2)(2)(2)= (2)^3=8 this is a cubed of 2,,, now its reversed is the cube root
cube root of 8=(8)^(1/3) =2

mark_o.
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if (b)^1/3=a
then (a)^3=b

mmbuckaroos
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right ok

mark_o.
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algebraically,,,,if (b)^1/3=a here lets put both sides to the power of 3
[ (b)^1/3 ]^3=[a]^3
[ (b)^3/3 ]=[a]^3
[ (b)^1 ]=[a]^3

mark_o.
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good luck now