Question 73823
simplify radical expressions. One of the problems I am having trouble with is: 
3?(2a^(7)b^(2))
COMMENT: I assume this problem is "cube root of (2a^7 b^2)"
You want the cube root so separate the perfect cubes from the other factors,
as follows:
= (cube rt. of a^6)(cube rt. of 2ab^2)
Since the 1st factor is a perfect cube you have:
=a^2*(cube rt of 2ab^2)
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(2) 3?(5x^(7)y)
COMMENT: I assume this problem is "cube root of (5x^7 y)"

Break it up into perfect cube and "the rest", as follows:
=(cube rt. of x^6)*(cube rt of 5xy)
= x^2*(cube rt of 5xy)
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(I do not know how to make cubed roots; the index is three.) 
I know the answer is: 
(y) 3?(150x)
Where did you get that answer??  That is not the answer to
the problem you posted.
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COMMENT:
I think you may not have posted your problems correctly.

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10x^(2) ???????????
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Cheers,
Stan H.