Question 1140436
.
<pre>

{{{-sqrt((9+y)^2)}}} = -|9+y|.     ( ! and it is TRUE for any real y - does not matter if it is lesser than -10 or greater ! )


For example, if  y = -13.  then  {{{-sqrt((9+(-13))^2)}}} = {{{-sqrt((9-13)^2)}}} = {{{-sqrt((-4)^2)}}} = {{{-sqrt(4^2)}}} = -4 = -|9 + (-13)|.
</pre>

Solved. answered, explained and completed.