Question 1013801
.
{{{sqrt(16 * 10^4) - 2 * 10^2}}} is it you are asking about?


<pre>
If so, then {{{16*10^4}}} = {{{(4*10^2)^2}}}.     (is it clear?)

Next, {{{sqrt(16*10^4)}}} = {{{sqrt((4*10^2)^2)}}} = {{{4*10^2}}}.

Therefore, 

{{{sqrt(16 * 10^4) - 2 * 10^2}}} = {{{4*10^2}}} - {{{2*10^2}}} = {{{2*10^2}}}.
</pre>

Next time write your formulas in a more readable way please.