How do I do this math problem

3√7/12
(It's written like this on the sheet: http://imageshack.us/photo/my-images/841…

(Don't say "DO YOUR HOMEWORK YOURSELF!' It's not homework. It's just extra studying for a test.)

Thanks!

I think they're asking you to simplify the radical? You can't have a radical in the denominator so you need to get rid of it. A rule of radicals is that a quotient under a radical can be converted to a quotient of two separate radicals.
example:
√a/b = √a/√b

3(√7 / 12)
3(√7 / √12) {now you can pull a perfect square out of the 12}
3(√7 / √4 * √3)
3(√7 / 2√3) {now rationalize the denominator by multiplying by √3 / √3}
(3√7*√3) / (2*3) {the factors o 3 in the numerator and denominator reduce to 1}
√21/2

No, Mohd. David is correct as the image was provided of the original question.

√21 / 2 confirmed.

if you are trying to rationalize the denominator

3 * √(7/12)

3√7 / √12

(3√7 * √12) / (√12 * √12)

(3√7 * 2√3) / 12

6√21 / 12

√21 / 2

I think it means (3√7)/12, hence, (3/12)√7 = (1/4)√7 = √7/4