# What is the square root of 5 minus 6 the square root of 5?

Is it not....$- 5 \sqrt{5}$?
We gots… $\sqrt{5} - 6 \sqrt{5} = - 5 \sqrt{5}$
i.e. $x - 6 x = - 5 x$...where $x = \sqrt{5}$...