Question

Which expression is equivalent to 3V 45 – 7V20? -20-630 – 20/5-5/5

Answer 1

`-5√(5)`

Step-by-step explanation:

Here, we want to simplify the given expression

We have that as follows:

`\begin{gathered} 3√(45)\text{ = 3}*√(45)\text{ = 3}*√(9*5)\text{ = 9}√(5) \\ 7√(20)\text{ = 7}*√(20)\text{ = 7}*\text{ }\sqrt{4\text{ }}\text{ }*\sqrt{5\text{ }}\text{ = 14}√(5) \end{gathered}`

Thus, we have the difference as:

`9√(5)\text{ - 14}√(5)\text{ = -5}√(5)`