SOLUTION: 12 divided by the square root of 20 now when i worked this out i got 3 radical 20 over 5 but the back of the book got 6 radical 5 over 5. i dont see how they got this... teac

Question 40802: 12 divided by the square root of 20
now when i worked this out i got 3 radical 20 over 5 but the back of the book got 6 radical 5 over 5. i dont see how they got this...
teacher: robert rapalje
christina
intermediate algebra- one step at a time
Found 2 solutions by astromathman, tutorcecilia:
Answer by astromathman(21) (Show Source): You can put this solution on YOUR website!

Answer by tutorcecilia(2152) (Show Source): You can put this solution on YOUR website!
You have already completed 90% of the problem (good job!). Now you just need to further simplify the radical by factoring 20.
3(radical 5 X 4)/5
Simplify the terms under the radical by finding the square root of 4:
(radical 4 = 2)
Multiply by 2, simplify and you have the correct answer:
3 X 2 (radical 5)/5
6(radical 5)/5

RELATED QUESTIONS
I have done this chapter over completely 5 times now and still I am not getting the why... (answered by richwmiller)
25x^4-25x^2+6=0 i worked the problem out and got x=square root of 3/5 and 2/5 am i... (answered by swincher4391)
hi, I was wondering if you could help figure how to work a couple of radical... (answered by stanbon)
I am having a problem solving this radical. 3 times square root 6 divided by the square... (answered by mukhopadhyay)
solve the following equation: radical 12-x is equal to radical x+6. when I worked this... (answered by stanbon)
How to simplify this. The book says the answer is -17 but I want to learn how to do it.... (answered by josgarithmetic)
I understand somewhat how to find teh LCD in problems, but the issue I am running into is (answered by Alan3354,solver91311,Earlsdon)
Simplify by taking roots of the numerator and the demoninator. Assume that all... (answered by rapaljer)
I just took a math test and was disappointed to see that I got a "C." I had worked very... (answered by chessace)