If x2+ y2 = 29 and x - y = 3, then what is the value of 4xy?

40 56 60 16

40

If x2+ y2 = 29 x - y = 3 what is the value of 4xy (x - y)2 =  x2+ y2 - 2xy (3)2 =  29 - 2xy 2xy = 20 xy = 10 4xy = 10 × 4 = 40