Radical Expression #2

[Iceycold12]

Hello, I have a radical expression that needs to be simplified and wanted to check my answer.

Here's the expression:

, I just looked at the Numerator & Denominator and see if I could simplify any and I reduced the 81 to 9, and my answer was:

, but now looking at it, 10 divided by 9 is not equal to

, which is: .351364184. I have another answer choice which is

, but that's nowhere near .351, in fact, it's 28.46.

Thanks.

 

[pappus]

Hello, I have a radical expression that needs to be simplified and wanted to check my answer.

Here's the expression:

, I just looked at the Numerator & Denominator and see if I could simplify any and I reduced the 81 to 9, and my answer was:

, <--- originally the 10 was under a root-sign too. Where has it gone?
but now looking at it, 10 divided by 9 is not equal to

, which is: .351364184. I have another answer choice which is

, but that's nowhere near .351, in fact, it's 28.46.

Thanks.

...

 

[Iceycold12]

Ahhh, little little mistakes so it's (sqrt10)/9 which equals .351, those sharp eyes pappus!

 

[lookagain]

I have another answer choice which is

,

but that's nowhere near .351,

in fact, it's 28.46. No, it is about 1.29

Now, if you had meant to have typed 9*sqrt(10),

then that would be about 28.46

....