5) $0{,}5\(\sqrt{20}$-0{,}3$\sqrt{45}$-0{,}1$\sqrt{500}$=

Question

Вопрос: $Фото задания: 5) $0{,}5\(\sqrt{20}$-0{,}3$\sqrt{45}$-0{,}1$\sqrt{500}$=$ Фото задания

Accepted Answer

$\sqrt{20}=2\sqrt5$, $\sqrt{45}=3\sqrt5$, $\sqrt{500}=10\sqrt5$.

$0{,}5\cdot2\sqrt5-0{,}3\cdot3\sqrt5-0{,}1\cdot10\sqrt5=(1-0{,}9-1)\sqrt5=-0{,}9\sqrt5$.

Ответ: $-0{,}9\sqrt5$.

5) \(0{,}5\(\sqrt{20}\)-0{,}3\(\sqrt{45}\)-0{,}1\(\sqrt{500}\)=