You can
put this solution on YOUR website!Problem:
.

.
solve for x.
.
Begin by squaring both sides. When you do that the equation becomes:
.

.
which becomes:
.

.
solve for x by subtracting 13 from both sides to get:
.

.
The solution, therefore, is

.
Check by substituting 12 for x in the original equation:
.

.
Add the terms in the parentheses:
.

.
The square root of 25 results in +5, so the equation is true and the answer x = 12 works.
.
Hope this helps you to understand the problem.