门| GATE-CS-2014-(Set-2) |第 65 题

(一) 3.464
(乙) 3.932
(C) 4.000
(四) 4.444答案： (C)
解释：

let x = the given expression.
Now squaring both sides.

(x)^2 = 12 + x
(x)^2 - x - 12 = 0

Now solve this quadratic equation for finding the 
roots(value of x, or this expression).
(x-4)(x+3) = 0

hence x = 4.

这个问题的测验