To find the least common denominator of the book I'm reading says to multiply them to get a common denominator of

But wouldn't it be more efficient to find the square roots of the second fraction before multiplying?

To find the least common denominator of the book I'm reading says to multiply them to get a common denominator of

But wouldn't it be more efficient to find the square roots of the second fraction before multiplying?

But wouldn't it be more efficient to find the square roots of the second fraction before multiplying?

- jaybird0827
**Posts:**21**Joined:**Tue May 26, 2009 6:31 pm**Location:**NC-
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Where do you get the idea that the square root of a fraction is equal to the fraction?To find the least common denominator of the book I'm reading says to multiply them to get a common denominator of

But wouldn't it be more efficient to find the square roots of the second fraction before multiplying?

Please compare the value of with by plugging a random value such as into each of these expressions for . Are you sure that for all ?

Also, you may find it helpful to review lcm and gcf here: http://www.purplemath.com/modules/lcm_gcf.htm

Oh, I see now... Thought I could cheat my way through and remove the exponent by squaring, guess not!

Thanks for your help, and the link, although my problem wasn't LCM/GCF here :P

Edit: I just noticed you moved this thread, sorry for posting in the wrong area, arithmetic's description listed fractions...

Thanks for your help, and the link, although my problem wasn't LCM/GCF here :P

Edit: I just noticed you moved this thread, sorry for posting in the wrong area, arithmetic's description listed fractions...