If (x+y)=8 and (x-y)=6, what is the value of xy?
A
7
B
6
C
1
D
3
Correct Answer: 7
দেযা আছে,x + y = 8 , x - y = 6xy = (x + y2)2 - (x - y2)2 = (82)2 - (62)2 = 644 - 364 = 64 - 364 = 284 = 7