Question 995703
The negative square root of a number equals the number decreased by 2. Find the number.

I tried this:
let n be the number
- sqrt ( n )= n - 2 
square both sides,
n = n^2-4n+4
Subtract n
{{{n^2 - 5n + 4 = 0}}}
(n-4)*(n-1) = 0
n = 1
n = 4