Assertion (A): If x > y, x + y = 6 and x - y = 2 then x2 + y2 = 40
Reason (R): (x + y)2 + (x - y)2 = 2(x2 + y2)
A is true, but R is false.
A is false, but R is true.
Both A and R are true, and R is the correct reason for A.
Both A and R are true, and R is the incorrect reason for A.