Help with square roots?

Question

i understand how to figure them out but i don't know how to show my work...it's the square root of 40, it's 6.3 but how do i show my work? thanks!

Answer 1

-----√40

-------------√4√10  --- find the highest perfect root that equals 40 is 4.  (4X10= 40)                            

another example √16---- √4√4 --- 2(2)= 4.

--------------------------2√10  ---- 2 is the square root of 4

--------------------------------------...  

and find the square root of 10 and multiply it by 2.

Answer 2

It's actually 2√10    

see:

√40 = √4 x √10

√4=2, and the √10 is not a whole number, so answer is 2√10