Pleas help! I do not understand.

Distance between 2 points formula:
d = √[(x1 - x2)^2 + (y1 - y2)^2]
Plug in
d = √[(-4√2 + √32)^2 + (-√12 - 2√3)^2]
d = √[(-4√2 + 4√2)^2 + (-2√3 - 2√3)^2]
d = √[0 + (-4√3)^2]
d = √(16 * 3)
d = 4√3
Answer
Last one
4√3