Express in simplest radical form

Question

7√5 - 9√5

Answer 1

To express 7√5 - 9√5 in simplest radical form, we can combine the two terms with the same radical:

7√5 - 9√5
= (7 - 9)√5
= -2√5

So, 7√5 - 9√5 in simplest radical form is -2√5.