## Algebra 1

$\sqrt5\times\sqrt{45}\longrightarrow$ factor out the perfect square from 45 =$\sqrt5\times\sqrt{9\times5}\longrightarrow$ multiplication property of square roots =$\sqrt5\times\sqrt9\times\sqrt5\longrightarrow$ simplify =$3\times\sqrt5\times\sqrt5\longrightarrow$ simplify =$3\times5\longrightarrow$ multiply =$15$