#1

I have this question that i'm not understanding at all. Its simplification of a radical expression.

Solve:

2/3-√2

HELP GUYS!

Solve:

2/3-√2

HELP GUYS!

#2

-2.66?

#3

negative .7475468957

but it can't be simplified

but it can't be simplified

*Last edited by B. Heath at Sep 2, 2008,*

#4

the only thing that i can think of is (2-3√2)/3

#5

Just download PowerToy calculator. Lazy bum.

#6

NO GUYS!

I need it simplified! not the actual answer....

I need it simplified! not the actual answer....

#7

2/3+-1√2

?

?

#8

42

#9

well simplify the root 2 ant ake it away from 2/3

duh

duh

#10

#11

i'm still sticking with my original answer, but i would also not worry about simplifing it in the first place because there isnt but so much you can do with that one

#12

negative .7475468957

this

EDIT:

nvm it is simplified

the only other thing u could do is put a -/+ sign in front of the radical

*Last edited by Frontbassman at Sep 2, 2008,*

#13

I'm pretty sure that's as simplified as it can get because 2/3 can't be reduced and √2 can't be reduced either.

#14

If I'm reading your math prob right you are supposed to find 2/3 - the square root of 2.

Well the square root of 2 is 1.41421356 and then some because it is an irrational number and therefore goes on forever. any way 2/3 - 1.414 = -0.747546896.

Hope that helps and I have no guarantees

Well the square root of 2 is 1.41421356 and then some because it is an irrational number and therefore goes on forever. any way 2/3 - 1.414 = -0.747546896.

Hope that helps and I have no guarantees

#15

I'm pretty sure that's as simplified as it can get because 2/3 can't be reduced and √2 can't be reduced either.

this is what i thought too..

#16

put them on the same ( sorry im french speakin ) number under the bar in the fraction like multiply the root 2 by 3 and put it on 3 ya know ??

#17

i figured it out. our instructions were to simplify each one.

the correct answer was solved in this way:

1. 2/3-√2

2. rationalize bottom, so you end up with 2(3+2√2)/3+√2

3. multiply the 2 together and you get 6+2√2/9-2

4. simplifies to 2+2√2/3-2

5. final answer: 2+2√2

thanks guys, but figured it on my own anyhow :P

the correct answer was solved in this way:

1. 2/3-√2

2. rationalize bottom, so you end up with 2(3+2√2)/3+√2

3. multiply the 2 together and you get 6+2√2/9-2

4. simplifies to 2+2√2/3-2

5. final answer: 2+2√2

thanks guys, but figured it on my own anyhow :P

#18

Sh

Damn I got -6.

Maybe I'm just not understanding how it's typed out. I suck at math on computers.

**it I need to know this for the next few weeks.**Damn I got -6.

Maybe I'm just not understanding how it's typed out. I suck at math on computers.

#19

2/3-√2

okay 2/3 - sqrt2

2 - 3 * sqrt 2

___________

3

that's your answer

(2 - 3sqrt2)/3

okay 2/3 - sqrt2

2 - 3 * sqrt 2

___________

3

that's your answer

(2 - 3sqrt2)/3

#20

7.

#21

i figured it out. our instructions were to simplify each one.

the correct answer was solved in this way:

1. 2/3-√2

2. rationalize bottom, so you end up with 2(3+2√2)/3+√2

3. multiply the 2 together and you get 6+2√2/9-2

4. simplifies to 2+2√2/3-2

5. final answer: 2+2√2

thanks guys, but figured it on my own anyhow :P

Hmmm...not sure if I'm following you right. But I do know this

2/3-√2 is not equal to 2+2√2

I'm certain of that

#22

42

that's the meaning of life.

not the answer to his question.

#23

multiply root 2 by 3/3. simplified it equals 2-3root2.

Idk how to type the square root sign.

Idk how to type the square root sign.

#24

multiply root 2 by 3/3. simplified it equals 2-3root2.

Idk how to type the square root sign.

hey come on that's what i said like last page, and i didn't get any credit.

He's right. I'm right. We're both right.

The answer is....

( 2 - 3 * sqrt(2) ) / 3

just put it down.

#25

The answer is....

( 2 - 3 * sqrt(2) ) / 3

just put it down.

I got that ^ but out of curiosity, i tried to see if i could get the root to cancel itself out somehow....

I keep getting -2/3

I take the 2/3 - root2

multiply root2 * root2/root2 = 2/root2

so 2/3 - 2/root2

a little 5th grade fraction work spits out

2*root2/3*root2 - 6/3*root2

or

2*root2 - 6 / 3*root2

if this ^ is true, you cancel out the square roots leaving

-2/3

but it can't be this simple... am i doing something wrong?

i mean i know for a fact square root of 2 is not equal to 4/3....

#26

if ya mean 2/3-√2 then its simplified (the 2 is not over the -√2)

or if ya mean 2/(3-√2) then you multiply the top and bottom by (3+√2)

so ya get 2(3+√2)/(3-√2)(3+√2)

simpified its...

2(3+√2)/7

just finished the summer precalc hw that was about this stuff..

or if ya mean 2/(3-√2) then you multiply the top and bottom by (3+√2)

so ya get 2(3+√2)/(3-√2)(3+√2)

simpified its...

2(3+√2)/7

just finished the summer precalc hw that was about this stuff..

#27

Dude dude arent you guys like just worsening the sum...

It seems to be simplified to the max with 2/3- rt2

Maybe 2- 3rt2

But all these fractions you guys are getting are just less simplified

It seems to be simplified to the max with 2/3- rt2

Maybe 2- 3rt2

But all these fractions you guys are getting are just less simplified