Question 90906
Question:


what is 5 square root 20


Answer:


Hope your question is like this....


{{{5*sqrt(20)}}}


This can be written as, {{{5*sqrt(4*5)}}}


We know that {{{sqrt(4)}}}= 2


==> {{{ 5 * sqrt(4) sqrt(5)}}} = {{{ 5 * 2 * sqrt(5)}}}



==> = {{{10*sqrt(5)}}}, which is the simplified answer.



Again...if you need to evaluate the given expression you can take the value of {{{sqrt(5)}}} which is  2.236 approximately and can find out the answer...



That is {{{10*sqrt(5)}}} = 10 * 2.236 = 22.36 approximately.



Hope you found the explanation useful.



Regards.


Praseena.