Răspuns:
Explicație pas cu pas:
eu voi nota cu x, y si z ca sa fie mai usor de urmarit
[tex]x=\frac{\Delta}{\Delta_{x}} \\y=\frac{\Delta}{\Delta_{y}} \\z=\frac{\Delta}{\Delta_{z}}[/tex]
[tex]\Delta=\left|\begin{array}{ccc}1&1&1\\-2&-2&3\\2&3&-1\end{array}\right|[/tex]
1 1 1
-2 -2 3
Δ=(2-6+6)-(-4+9+2)=-5
[tex]\Delta_{z}=\left|\begin{array}{ccc}1&1&1\\-2&-2&3\\2&3&-2\end{array}\right|[/tex]
1 1 1
-2 -2 3
Δz=(4-6+6)-(-4+9+4)=-5
[tex]z=\frac{-5}{-5} =1[/tex]
[tex]\Delta_{y}=\left|\begin{array}{ccc}1&1&1\\-2&3&3\\2&-2&-1\end{array}\right|[/tex]
1 1 1
-2 3 3
Δy=(-3+4+6)-(6-6+2)=5
[tex]y=\frac{5}{-5} =-1[/tex]
[tex]\Delta_{x}=\left|\begin{array}{ccc}1&1&1\\3&-2&3\\-2&3&-1\end{array}\right|[/tex]
1 1 1
3 -2 3
Δx=(2+9-6)-(4+9-3)=5-10=-5
[tex]x=\frac{-5}{-5} =1[/tex]
