The equation is
.
(Square each side and eliminate the square roots)
\
(Simplify)
(Subtract
from each side)


Apply quadratic formula:
.
(Substitute a = 1, b =
13 and c = 30) \ \
(Product of two same signs is positive) \ \
(Evaluate powers:
)
(Simplify) \ \
\ \
(Evaluate square roots:
)
Separate solutions are 

Check:
\To check the solution substitute
in
.

(Multiply:
)
(Subtract:
and
)
(Evaluate square roots:
)
The solution is "True".
The solution is "True".