Question

simplifying radicals

Answer 1

\[\sqrt{28}+3\sqrt{7}\]

Answer 2

how would you simplify this radical expression ^

Answer 3

Notice that 28 = 4 * 7, and therefore Sqrt[28] = Sqrt[4 * 7].

Answer 4

\[\sqrt{28}+3\sqrt{7}=\sqrt{4}\sqrt{7} + 3\sqrt{7} = \sqrt{7} (2+3) = 5\sqrt{7}\]

Answer 5

how would you simplify his radical expresssion:: \[\sqrt{5}-3\sqrt{5}\]

Answer 6

Like the third step in my previous answer

Answer 7

\[\sqrt{5}(1-3)\] take it from there.

Answer 8

how would you simplify this radical expression::\[\sqrt{5}(\sqrt{3}+2\sqrt{5)}\]

Answer 9

\[\sqrt{5}\sqrt{3 }+2\sqrt{5}\sqrt{5}=\sqrt{15} +10\]

Answer 10

i'm still a bit confused on how to simplify radicals; how would you simplify this one?
\[2\sqrt{45}-6\sqrt{5}\]

Answer 11

\[2\sqrt{9}\sqrt{5}-6\sqrt{5} =0\]
What happened to the other?

Answer 12

9 = 3*3, 3*2 = 6, and 6-6=0

Answer 13

U OK with these now?

Answer 14

no!!!!!

Answer 15

OK, what isn't clear? All of it, some of it...?

Answer 16

\[\sqrt{28}+3\sqrt{7}\]

Answer 17

i just dont understand it at all

Answer 18

But u do understand what a square root is?

Answer 19

yes

Answer 20

Alright, so what's \[\sqrt{28}\sqrt{28}\]

Answer 21

i dont have time to sit here and do this i just need a simple explaination on radicals!

Answer 22

How much time do you have?

Answer 23

i just nean explination on radicals because i have to finish this test!

Answer 24

I used to call them surds.

I suppose you could read this http://en.wikipedia.org/wiki/Nth_root

Answer 25

All the properties (rules and definitions) are there.

Answer 26

or i just need answers!

Answer 27

Well, I can give you the answers if that's all you want...

Answer 28

Someone else asking... http://openstudy.com/groups/mathematics#/groups/mathematics/updates/4e0340a30b8b35337e29b239