How do you simplify -abs(8+9-21)?

1 Answer
Jun 8, 2016

We can simplify the expression to -4

Explanation:

color(lightblue)"How?"

~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
- First we add the numbers inside | |
=> 8+9-21= 17-21 => -4

Now we are left with -|-4|

We have to apply absolute rule which is |-a|=a

|-4|=4

We sill have -

-|-4| => -4

~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
That is all, easy right? color(green)"✔"