Question

If x =7+root 400 find the value of root x +1/root x

Answer 1

x=7+root 400
x = 7 + 20
   = 27
therefore , root x+1/root x
                 = root 27 + 1/ root 27
                 = ( 27 + 1) / root 27
                 =  28 / root 27
                 =  28xroot27 / 27