Ответ:
\(\overrightarrow{PQ}=(-2-5;\,1-8)=(-7;\,-7)\).
\(\overrightarrow{QR}=(3-(-2);\,-4-1)=(5;\,-5)\).
Ответ: \(\overrightarrow{PQ}=(-7;\,-7)\), \(\overrightarrow{QR}=(5;\,-5)\).
\(\overrightarrow{PQ}=(-2-5;\,1-8)=(-7;\,-7)\).
\(\overrightarrow{QR}=(3-(-2);\,-4-1)=(5;\,-5)\).
Ответ: \(\overrightarrow{PQ}=(-7;\,-7)\), \(\overrightarrow{QR}=(5;\,-5)\).