Posted by Shreya on Tuesday, January 10, 2012 at 8:31pm.
|3|-|9|=-5...ANSWER IS |5|
First 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.
thanks jordan and reiny :) but reiny i not understand the whole absolute value thing becuase for -|-sqrt81| you get -9 and that not positive.
You 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 ||
okay 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||.
work 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 )
okay 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
i not meant f i mean 5.
Did you not read what I said before the
||5|-|-32|| ??
okay wait i think i sort of get it now. and absolute value mean how far you are from 0 ?