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det(\left(\begin{matrix}13&6&5\\3&6&-4\\13&8&3\end{matrix}\right))
Kimihia te tau whakatau o te poukapa mā te whakamahi i te tikanga hauroki.
\left(\begin{matrix}13&6&5&13&6\\3&6&-4&3&6\\13&8&3&13&8\end{matrix}\right)
Whakaroatia te poukapa taketake mā te tāruarua i ngā tīwae tuatahi e rua hei tīwae tuawhā me te tuarima.
13\times 6\times 3+6\left(-4\right)\times 13+5\times 3\times 8=42
Tīmata atu i te tāurunga mauī o runga, whakareatia whakararo i ngā hauroki, ka tāpiri i ngā hua ka puta.
13\times 6\times 5+8\left(-4\right)\times 13+3\times 3\times 6=28
Tīmata atu i te tāurunga mauī o raro, whakareatia whakarunga i ngā hauroki, ka tāpiri i ngā hua ka puta.
42-28
Tangohia te tapeke o ngā hauroki whakarunga mai i te tapeke o ngā hua hauroki whakararo.
14
Tango 28 mai i 42.
det(\left(\begin{matrix}13&6&5\\3&6&-4\\13&8&3\end{matrix}\right))
Kimihia te tau whakatau o te poukapa mā te whakamahi i te tikanga whakaroha ā-tauriki (te tikanga whakaroha ā-tauwehe tahi rānei).
13det(\left(\begin{matrix}6&-4\\8&3\end{matrix}\right))-6det(\left(\begin{matrix}3&-4\\13&3\end{matrix}\right))+5det(\left(\begin{matrix}3&6\\13&8\end{matrix}\right))
Hei whakaroha mā ngā tauriki, me whakarea ia huānga o te haupae tuatahi ki tana tauriki, arā, ko te tau whakatau o te poukapa 2\times 2 i hangā mā te muku i te haupae me te tīwae i roto anō taua huānga, kātahi ka whakarea ki te tohu tūnga o taua huānga.
13\left(6\times 3-8\left(-4\right)\right)-6\left(3\times 3-13\left(-4\right)\right)+5\left(3\times 8-13\times 6\right)
Mō te poukapa 2\times 2 \left(\begin{matrix}a&b\\c&d\end{matrix}\right), ko te ad-bc te tau whakatau.
13\times 50-6\times 61+5\left(-54\right)
Whakarūnātia.
14
Tāpirihia ngā kīanga tau hei kimi i te otinga whakamutunga.