Question

Simplify the radical expression posted below by rationalizing the denominator. (can you show me how to do this step my step)

Answer 1

\[2\sqrt{108} \div \sqrt{180y}\]

Answer 2

@jim_thompson5910 ....

Answer 3

start off by multiplying top and bottom of the fraction by sqrt(108y)

Answer 4

what do you get when you do this

Answer 5

sry i meant to say sqrt(180y)

Answer 6

nevermind thats not right

Answer 7

no idk how you got that

Answer 8

1449y?

Answer 9

i did 180, not sqrt

Answer 10

are you familiar with the idea of rationalizing the denominator?

Answer 11

they talked about it in school one day but i was watching my sister while i was doing the lesson....
How do you do it?

Answer 12

ok I can find a few pages that explain it (it's a bit long)

Answer 13

tell me what you think of this page

http://www.purplemath.com/modules/radicals5.htm

Answer 14

Looks good. Thanks

Answer 15

sure thing

Answer 16

Ok so what im i rationalizing

Answer 17

the denominator, so you have to multiply top and bottom by sqrt(180y)