Answer
2$\sqrt5$ +5$\sqrt 3$
Work Step by Step
$\sqrt5$ ( 2+ $\sqrt 15$)=2$\sqrt5$ + $\sqrt 5$$\times$ $\sqrt 15$=
2$\sqrt5$ + $\sqrt 5$$\times$ $\sqrt 5$$\times$$\sqrt3$=
2$\sqrt5$ +5$\sqrt 3$
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