## Intermediate Algebra: Connecting Concepts through Application

Shania made a mistake in simplifying $8\sqrt{20}$. The correct answer is $9\sqrt5$.
Shania made a mistake in simplifying $8\sqrt{20}$. The correct solution and answer is: $8\sqrt{20} -7\sqrt5 \\=8\sqrt{4(5)}-7\sqrt{5} \\=8\cdot 2\sqrt5 - 7\sqrt5 \\=16\sqrt5 - 7\sqrt5 \\=(16-7)\sqrt5 \\=9\sqrt5$