surds

[paper grail]

I just dont understand it well. I am doing something wrong can someone guide me?

[rare berry]

1. Wait patiently for a helper to come along.
2. Once someone helps you, say thank you and close the thread with:

+close

3. Feel free to nominate the person for helper of the week in #helper-nominations
4. Do not ping the mods, unless someone is breaking the rules.
5. If you're happy with the help you got here, and the server overall, you can contribute financially as well:

[paper grail]

With D

i got the 26 right but i dont understand how to get to the -4square root 2

[dense radish]

(5+sqrt2)(6-sqrt8)= 30-5sqrt8+6sqrt2-sqrt16 = 30-10sqrt2+6sqrt2-4=26-4sqrt2 @paper grail

what ur missing is that sqrt8=sqrt2^3=2sqrt2

[paper grail]

Alright let me look 1 sec please

I got it now but

I never knew this

[storm night]

no $\sqrt{2^{3}}=\sqrt{2^{2}} \times \sqrt{2}$

[vapid crown]

!𒐪 ɹɐupoɯ⇂ㄥ8𝟝 𒐪!

[storm night]

basically the above image

[paper grail]

Ahhhh yeah i get it now

I just tried it in another question and it worked

Tyam

Tysm*

[worthy remnant]

The tickets system is disabled for this server. Enable it at: https://yagpdb.xyz/manage/624314920158232616/tickets/settings.

[paper grail]

+close