## Algebra 1

$\sqrt7$
$2\sqrt{28}-3\sqrt7\longrightarrow$ factor out the perfect square =$2\sqrt{4\times7}-3\sqrt7\longrightarrow$ multiplication property of square roots =$2\times\sqrt4\times\sqrt7-3\sqrt7\longrightarrow$ simplify =$4\sqrt7-3\sqrt7\longrightarrow$ distributive property =$\sqrt7(4-3)\longrightarrow$ subtract =$\sqrt7$