Δ=
|2 –7 5|
|1 5 –5| =70–10+140–100–20+49=129,
|4 –2 7|
Δx=
|9 –7 5|
|–2 5 –5| = 315+20+840–600–90–98=387
|24 –2 7|
Δy=
|2 9 5|
|1 –2 –5| =–28+120–180+40+240–63=129,
|4 24 7|
Δz=
|2 –7 9|
|1 5 –2| = 240–18+56–180–8+168=258,
|4 –2 24|
x=( Δx)/ Δ =387/129=3,
y=( Δy)/ Δ =129/129=1,
z=( Δx)/ Δ =258/129=2.
Ответ: (3;1;2).