Given x = 84, y = 2.56, find x + Y-2 radical XY / radical x-radical y,

Given x = 84, y = 2.56, find x + Y-2 radical XY / radical x-radical y,

X + Y-2 radical XY / radical x-radical y
=(√x-√y)^2/(√x-√y)
=√x-√y
=√84-√2.56
=2√21-1.6
=9.2+1.6
=10.8
You can understand