Question with rationalizing denominator

[storm comet]

1. Do not ping the Moderators, unless someone is breaking the rules.
2. Do not ping the Helper Moderators, unless there is a conflict between helpers.
3. Do not ping other members randomly for help.
4. Ask your question and show the work you've done so far. If you've posted a screenshot of a question, specify which part you need help with.
5. Wait patiently for a helper to come along.
6. If the Helper has answered your question, remember to thank them with the Mathematics Ranks bot and close the thread with:

+close
Feel free to nominate the person for helper of the week in #helper-nominations
If you're happy with the help you got here, and the server overall, you can contribute financially as well:

[quartz crown]

I talk about the one above

Numerator

[chilly skiff]

$-\sqrt6-\sqrt6$?

[compact steeple]

!𒐪 ɹɐupoɯ⇂ㄥ8𝟝 𒐪!

[chilly skiff]

what does that evaluate to

[quartz crown]

-root6

-1root6

[chilly skiff]

nope

try again

but at lesat you know its not 0

[quartz crown]

Whaaaat?

Hold on

Mmm

-2root6

[chilly skiff]

yup

[quartz crown]

cuz -1-1=-2

[chilly skiff]

so thats why they ddint cancel

do you get it now

[quartz crown]

Oh

Yep

[chilly skiff]

nice

[quartz crown]

I'm stupidest person when comes to math

[chilly skiff]

nono dw we all have our moments

[quartz crown]

Practice will make it perfect, you're absolutely right