SOLUTION: Please help. These problems look so easy but I just can't seem to get the right answer. First Problem: 1/√3 + 4/√27 - 2/√12 Second Problem: 2 cubed root

Algebra ->  Radicals -> SOLUTION: Please help. These problems look so easy but I just can't seem to get the right answer. First Problem: 1/√3 + 4/√27 - 2/√12 Second Problem: 2 cubed root      Log On


   



Question 48636: Please help. These problems look so easy but I just can't seem to get the right answer.
First Problem:
1/√3 + 4/√27 - 2/√12

Second Problem:
2 cubed root of 27x + 2 cubed root 64x
I came up with 2 answers:
14 cubed root of x -OR- 2 cubed root of 91x
Which one is correct??

Answer by consc198(59) About Me  (Show Source):
You can put this solution on YOUR website!
First Problem
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1/√3 + 4/√27 - 2/√12
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0.577 + 0.769 + 0.577 = 1.923
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Second problem
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2 cubed root of 27x + 2 cubed root 64x
I came up with 2 answers:
14 cubed root of x -OR- 2 cubed root of 91x
Which one is correct??
__________________________________________
The correct one is 2 cubed root of 91x
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Answers
Ist problem: 1.923
2nd problem: 2 cubed root of 91x