Question

√20 - 2√5solve with using adding and subtracting radicals

Answer 1

the initial expression is:

`\sqrt[]{20}-2\cdot\sqrt[]{5}`

so to rest them we want to have the same radical so we can rewrite the root of 20 so:

`\begin{gathered} \sqrt[]{4\cdot5}-2\cdot\sqrt[]{5} \\ 2\cdot\sqrt[]{5}-2\cdot\sqrt[]{5}=0 \end{gathered}`