Question

Метод Крамера.
Пожалуйста помогите!!!

Answer 1

$d = left[begin{array}{ccc}2&-1&1\3&2&2\1&-2&1end{array}right] = 4-2-6-2+3+8=5 \ \ dx = left[begin{array}{ccc}2&-1&1\-2&2&2\1&-2&1end{array}right] = 4-2+4-2-2+8=10 \ \ dy = left[begin{array}{ccc}2&2&1\3&-2&2\1&1&1end{array}right] = -4+4+3+2-6-4=-5 \ \ dz = left[begin{array}{ccc}2&-1&2\3&2&-2\1&-2&1end{array}right] =4+2-12-4+3-8= -15 \ \ x = frac{dx}{d}= frac{10}{5}=2; y = frac{dy}{d}= frac{-5}{5}=-1;z= = frac{dz}{d}= frac{-15}{5}=-3$
Ответ: (2; -1; -3)