SOLUTION: directions: simplify. (rad)54w^16/150z^4. how do i simplify and whats the answer?

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Question 123577: directions: simplify. (rad)54w^16/150z^4. how do i simplify and whats the answer?
Found 2 solutions by chitra, Edwin McCravy:
Answer by chitra(359) About Me  (Show Source):
You can put this solution on YOUR website!
The given expression is:

sqrt%28%2854w%5E16%29%2F%28150z%5E4%29%29

This can be written as:


sqrt%28%286+%2A+9+%2A+w%5E16%29%2F%2825+%2A+6+%2A+z%5E4%29%29+


%283w%5E8+%2A+sqrt%286%29%29%2F+%285z%5E2+%2A+sqrt%286%29%29+


Here sqrt(6) gets canceled on both the numerator & denominator

we remain with

%283w%5E8%29%2F5z%5E2

Thus the solution

regs

Answer by Edwin McCravy(20060) About Me  (Show Source):
You can put this solution on YOUR website!

Solution by Edwin:

sqrt%28%2854w%5E16%29%2F%28150z%5E4%29%29

Break everything into prime factors

54+=+2%2A3%2A3%2A3

w%5E16+=+wwwwwwwwwwwwwwww

150+=+2%2A3%2A5%2A5

z%5E4+=+zzzz

So 

sqrt%28%2854w%5E16%29%2F%28150z%5E4%29%29

becomes

sqrt%28%282%2A3%2A3%2A3wwwwwwwwwwwwwwww%29%2F%282%2A3%2A5%2A5zzzz%29%29

Put parentheses arond every pair of like factors which are multiplied:



Every pair of multiplied like factors is the square of that factor,
so write each pair as a square:



All the squares on top come out in front of the radical without an exponent
as a numerator.  All those on the bottom come out likewise but are in the
denominator in front.  Every factor that did not pair up stays under the
radical:

%28+%283wwwwwwww%29%2F%285zz%29+%29+sqrt%28%282%2A3%29%2F%282%2A3%29%29

Now write w%5E8 for wwwwwwww and z%5E2 for zz
and what's under the radical cancels out and leaves just 1

%28+%283w%5E8%29%2F%285z%5E2%29+%29+sqrt%28cross%282%2A3%29%2Fcross%282%2A3%29%29

or

%28+%283w%5E8%29%2F%285z%5E2%29+%291

or

+%283w%5E8%29%2F%285z%5E2%29+

Edwin