Question

please say me the solution of no. 2 with step.

Answer 1

Can you give options
But if we squared it from both side then,
= (√6+√6+........)^2
= 6+6+6+6........

Answer 2

whole root of 6 + x  = x
squaring both sides 
                        6 + x = x^2
                        x^2 - x - 6
                        x^2 +2x - 3x - 6
                        x ( x+2) -3 (x+2)
                        (x+2)(x-3)
                        x = 3 and x = -2
   root of (6+3) = 3