Algebra question...please help?

Question

the square root of the quantity (7-the square root of 51) squared?? is it the square root of 51-7??

Answer 1

√( [7 - √(51)]² )

√(n) = n^1/2

So,

( [7 - √(51)]² )^1/2

Using the exponential laws, we multiply the ^2, and the ^1/2

So we obtain,

7 - √(51)