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Anyone any good in math?

I am taking an online math course and I do not understand my assignment at all. It has to deal with square roots. Here is an example of one of the problems:

√3 -9 divided(or over) √12 + √3

Answer Question

Asked by OneChance at 6:45 PM on Apr. 19, 2009 in Just for Fun

Level 1 (0 Credits)
Answers (9)
• Is the square root sign over just the three in the numerator, or over the (3-9)?

Answer by Anonymous at 6:48 PM on Apr. 19, 2009

• Oh, and what are you supposed to do to the problem? Simplify or is it an equation (and you forgot to put what it's equal to LOL)?

Answer by Anonymous at 6:49 PM on Apr. 19, 2009

• Just the 3

Answer by OneChance at 6:49 PM on Apr. 19, 2009

• I know you have to get rid of the square roots on the bottom... but I don't remember how... I hope that little bit at least helps

Answer by ZaTa at 6:49 PM on Apr. 19, 2009

• I didn't forget to put what it's equal to, that is what the problem says. I am supposed to rationalize the denominator.

Answer by OneChance at 6:50 PM on Apr. 19, 2009

• do you know if the square root of 12 = 4 square roots of 3? o.o that would make things a lot easier

Answer by SandraB383 at 7:07 PM on Apr. 19, 2009

• AHA i has the answer. (âˆš3 -9) âˆš3 all over 9

Answer by SandraB383 at 7:16 PM on Apr. 19, 2009

• âˆš12 = 2âˆš3 which made it a lot easier =]

Answer by SandraB383 at 7:17 PM on Apr. 19, 2009

• square root of 12 = square root of 2x6 = square root of 2x2x3 = 2(square root of 3)

So....

2(square root of 3) + square root of 3

equals

square root of 3 (2+1) = square root of 3 (3)

So...

3(square root of 3) is the simplification of your denominator. Multiply top and bottom by (square root of 3)/(square root of 3)

Simplify.

Answer by Anonymous at 7:18 PM on Apr. 19, 2009

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