If x = 
and y = 
, then the value of 
is
Show answer & explanation
Correct answer: B
Explanation
The correct option is 2.
x = and y =
x + y = +
x + y = 
x + y = 
= 3
x × y = × = 1
(x + y)2 = x2 + y2 + 2xy (3)2 = x2 + y2 + 2
x2 + y2 = 7
{substituting x2 + y2 = 7 and xy = 1
= 