1. that1chick

Why does it not times the 2 (the radicand) as well?

2. that1chick

Since it was in the parenthesis shouldn't it be multiplied too?

3. that1chick

or do you not times the radicand when finding the perimeter of a rectangle?

4. ash2326

Where do you have doubt in this? $2(\sqrt{128}+\sqrt{200})= 2(8 \sqrt 2+ 10 \sqrt 2)= 2(18 \sqrt 2)=36 \sqrt 2$

5. ash2326

@that1chick

6. that1chick

2(√128+√200)=2(8√2+10√2)=2(18√2)=36√2 or 36√4?

7. that1chick

sorry my computer is being slow

8. that1chick

I just need to know if you times the radicand?

9. EvonHowell

Well, wouldn't you ask that in the other question ask the person who posted it?

10. ash2326

you have $2\times18 \sqrt {2}$ you'll just multiply it by 18 $36\sqrt 2$

11. that1chick

It was posted a while ago... and I did

12. ash2326

@EvonHowell it's ok to ask as a new post. It's related to maths

13. that1chick

so in 2(18√2) you would only times the 18 by 2?

14. ash2326

@that1chick If you have $2\sqrt 2$ then it's two times the radicand

15. ash2326

yes, if you have $2\times (4\times 6)$ Would you multiply it to both 4 and 6?

16. EvonHowell

Yes, I know it is I was just saying.. LOL but that question was asked 5 Months ago so I understand now :)

17. ash2326

Cool :)

18. ash2326

@that1chick do you get my point?

19. that1chick

Ok I get it... they shouldnt have put it in parenthesis. Thank you

20. ash2326

Nope, they can put in parenthesis. If you have $a(b+c)=a\times b+a\times c$ $a(b\times c)=(a\times b)c=a\times b\times c$

21. that1chick

are you saying that it didnt change the radicand because it was applied to the value being times by the radical and therefor would be applied that way

22. ash2326

It's applied to the whole term if you have 2 *(4*6) you apply 2 to either 4 or 6 not both. In our case we have a radical so it's applied to 18, it can be applied to radical also $2\times (18\sqrt {2})=18\times 2\sqrt 2$ Take the 2 inside $18\times \sqrt{4\times 2}=18\sqrt 8$ radical is just a no.

23. that1chick

Oh okay... x the other value makes it towhere you dont have to simplify again... I get it now, thank you

24. ash2326

Good :) welcome