If x+y=a and x-y =b ,then 2xy =

If x+y=a and x-y =b ,then 2xy =

A (b²-a²)/2

B (a²-b²)/2

C (a-b)/2

D (ab)/2

Solution

Correct Answer: Option B

দেওয়া আছে , x+y=a
এবং x-y =b
2xy = {(x+y)²-(x-y)²/2
=(a²-b²)/2