Answer
$5+x+2\sqrt{5 x}$
Work Step by Step
To simplify the expression, we distribute (FOIL) and combine the like terms as follows:
$$
(\sqrt x+\sqrt 5)^2=(\sqrt x)^2+2\sqrt x\sqrt 5+(\sqrt 5)^2\\
=x+2\sqrt{5 x}+5=5+x+2\sqrt{5 x}
.$$
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