Question 1106445
<pre>
{{{matrix(2,3,"","","",
(a+b)^(1/2),""="",613)}}} 

Raise both sides to the 2 power:

{{{matrix(2,3,"","","",
((a+b)^(1/2))^2,""="",613^2)}}} 

Multiply the exponents on the left to remove the
outer parentheses.  Square 613 on the right.

{{{matrix(2,3,"","","",
(a+b)^(expr(1/2)*2),""="",375769)}}}

{{{matrix(2,3,"","","",
(a+b)^1,""="",375769)}}}

{{{matrix(2,3,"","","",
a+b,""="",375769)}}}

That's not any of the choices.  Did you copy the
problem incorrectly?

Edwin</pre>