Question 421999
You need to get rid of negative sign you may use i^2 which is =-1
so your problem is sq root of 200 and use i with your answer

      write     200 and mark two digits from right 

  200 is written as   
                            
                          { 2{00
now think what nowhich multiplied by it self is less than 2  answer is 1
                         1{2 00}
                           1
                           -
                            100 (we subtracted, got one and brought down 00 together
now we had 1 as divisor and 1 as quotient we add it becomes 2

                      24 [ 100
                            96
                            --
                             4 we need to go in decimal we bring down 00
                         28{400   28 because we added 4 to 24 
                            281   28 and what digit which multiplied by itself is less than 400 answer is 1

our total answer is 14.1something

very confusing if you can not write properly
                        
do not forget your i  answer is 14.1i