If ax + by = 1 and bx + ay = 2ab then (x2 + y2)(a2 + b2)is equal to a2 + b2

If ax + by = 1 and bx + ay = 2ab then (x2 + y2)(a2 + b2)is equal to a2

1.	If ax + by = 1 and bx + ay = 2ab then (x2 + y2)(a2 + b2)is equal to a2 + b2
A.	1
B.	2
C.	0.5
D.	0
Answer» B. 2