Ответ:
x = 2 , y = 1
Пошаговое объяснение:
, D = 2*1 - 3*( - 3 ) = 11
Dx = , D = 1*1 - 7*(-3) = 22
Dy = , Dy = 2*7 - 3*1 = 11
x = , x = = 2 , x = 2
y = , y = = 1 , y = 1
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Ответ:
x = 2 , y = 1
Пошаговое объяснение:
Dx =![\left[\begin{array}{ccc}1&-3\\7&1\end{array}\right]](https://tex.z-dn.net/?f=%5Cleft%5B%5Cbegin%7Barray%7D%7Bccc%7D1%26-3%5C%5C7%261%5Cend%7Barray%7D%5Cright%5D "\left[\begin{array}{ccc}1&-3\\7&1\end{array}\right]")
, D = 1*1 - 7*(-3) = 22
Dy =![\left[\begin{array}{ccc}2&1\\3&7\end{array}\right]](https://tex.z-dn.net/?f=%5Cleft%5B%5Cbegin%7Barray%7D%7Bccc%7D2%261%5C%5C3%267%5Cend%7Barray%7D%5Cright%5D "\left[\begin{array}{ccc}2&1\\3&7\end{array}\right]")
, Dy = 2*7 - 3*1 = 11
x =
, x = 
= 2 , x = 2
y =
, y = 
= 1 , y = 1