Posted by Nancy on Friday, April 13, 2012 at 12:29am.
If (21x^2y/(75xy^5) mean:
sqrt ( 21 * x^2 * y / ( 75 * x * y^5))
then:
sqrt ( 21 * x^2 * y / ( 75 * x * y^5) ) =
sqrt ( 3 * 7 * x^2 * y / ( 3 * 25 * x * y^5 ) ) =
sqrt ( 7 * x / ( 25 * y^4 ) ) =
sqrt ( 7 x ) / sqrt ( 25 y^4) =
sqrt ( 7 x ) / 5 y^2
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