2-
1. . , ( ). 2- . , .
1x + b1y = c1,
2x + b2y = c2.
, b1 , , , b2.
(1 b2 2 b1) = c1 b2 c2 b1.
2- . , 2- , 1, 2, b1, b2, . .
, , : .
2- . , . . , , .
, , :
Det = 1 b2 2 b1.
1, 2, b1, b2 . , . . 1, b2 (+) , 2, b1 ().
.
= 35 12 = 23; = 24 + 2 = 26; = 0; = 1.
2- .
I. , , ( ):
= .
II. () :
= .
III. () , : =0.
IV. , , .. :
=q .
V. , :
=0.
VI. , , :
= .
3-
1. . :
= a1 b2 c3 + a2 b3 c1 + a3 b1 c2 a3 b2 c1 a2 b1 c3 a1 b3 c2.
.
= 72 + 280 +18 168 135 16 = 51.
= -9 + 28 20 10 24 21 = 56.
3- .
, 2- .