Question

Simplify.

Answer 1

simplify what?

Answer 2

i think you would just subtract the numbers infront of the radical. but im not sure

Answer 3

Since they have equal radicals you can subtract the two
17sqrt17-9sqrt17

8sqrt17

Answer 4

yup http://www.wolframalpha.com/input/?i=17sqrt17-9sqrt17

Answer 5

so if they have the same radicial in any problem all i do is add or subtract them?

Answer 6

yeah but there are instances where you need take out numbers out of the radical like:

5sqrt50 + 5sqrt5

Answer 7

you have to simplify the sqart 50 but other than that you cant simplify it. check out wolframalpha.com it can help with math and stuff

Answer 8

how do i do this one then

Answer 9

You can use the conjugate of the denominator which is (sqrt(3)-2) and multiply it to the denominator and numerator

Answer 10

can you show me

Answer 11

Ok lets multiply the denominator first

(sqrt(3) + 2)(sqrt(3) - 2)
FOIL First Outer INner last
First = sqrt3 (sqrt3) = 3
Outer= sqrt3 (-2)
Inner = sqrt3 (2)
Last = 2(-2)
Combine all of that
3 -2sqrt3 +2sqrt 3 -4
You get
3-4
=-1 <--- this would be the denominator

For the numerator

6(sqrt3 - 2)
Distribute
6sqrt3 -12

So the answer would be

6sqrt3 -12 / (-1)

Simplify (divide the numerator by -1)
-6sqrt3 +12

= 12 - 6sqrt3 <--- There you go

Answer 12

thansk