Answer:
Step-by-step explanation:
We want to find 
. 
can be written as 
, so we can now write our original equation as: 
.
We can combine like terms: 
Hope this helps!
The answer is 2, simply because you need to make that negative sign a positive sign. To do that you will need to flip the numerator and denominator. Meaning that it will be 4/1 now. By doing this your exponent became positive! So if your teacher just wanted you just rewrite it, it would be (4/1)^1/2, but if you were to evaluate that, it would be 2
