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May 28, 2015

May 28, 2015

Posted by **Shreya** on Tuesday, January 10, 2012 at 8:31pm.

|8|

okay i know this means square root of 8 squared and that would be 8.

|-8|

this also positive because negative 8squared gives you positive.

i not get these ones

||3|-|9||

theres too many lines

and these one

-|-sqrt81|

-|cubicrt27

||5|-|-32||

- math-calculus -
**Jordan**, Tuesday, January 10, 2012 at 8:35pm|3|-|9|=-5...ANSWER IS |5|

- math-calculus -
**Reiny**, Tuesday, January 10, 2012 at 8:38pmFirst of all |8| does not mean "square root" it means

absolute value.

In simple terms it means that you want to take the positive result of the value inside the | | signs.

||3-|9||

= |3-9|

= |-6|

= 6

-|-√81|

= -|-9|

= - 9

etc.

- math-calculus -
**Shreya**, Tuesday, January 10, 2012 at 8:40pmthanks jordan and reiny :) but reiny i not understand the whole absolute value thing becuase for -|-sqrt81| you get -9 and that not positive.

- math-calculus -
**Reiny**, Tuesday, January 10, 2012 at 8:43pmYou have a - sign in front of the whole mess.

suppose it wasn't there, then the answer would be +9

But it is there, so .....

don't confuse a negative inside the || with one outside of the ||

- math-calculus -
**Shreya**, Tuesday, January 10, 2012 at 8:46pmokay so everything in || will always be positive? and can u please explain how did u get rid of the two extra lines here ||3-|9||.

- math-calculus -
**Reiny**, Tuesday, January 10, 2012 at 8:53pmwork it like you had brackets.

start with the innermost and work towards the outside ones, only drop the || signs if you have a single digit left inside.

e.g. the last one:

||5|-|-32||

= | 5 - 32| , I worked on the inside ones

= | -27|

= 27

(perhaps in your notebook you could use different colours for each set,

e.g.

use red for the inside, and blue for the inside )

- math-calculus -
**Shreya**, Tuesday, January 10, 2012 at 8:59pmokay those bracket lines really confusing. how you get |5-32| because that negative sign be separated from f and -32. sorry i just real confused right now

- math-calculus -
**Shreya**, Tuesday, January 10, 2012 at 9:00pmi not meant f i mean 5.

- math-calculus -
**Reiny**, Tuesday, January 10, 2012 at 9:12pmDid you not read what I said before the

||5|-|-32|| ??

- math-calculus -
**Shreya**, Tuesday, January 10, 2012 at 9:15pmokay wait i think i sort of get it now. and absolute value mean how far you are from 0 ?