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10.13.4x12 + 8x1x2 + 4x1x3 + 8x22 + 8x2 x3 + x32.

10.14.4x12 + 8x1x2 + 4x1x3 + 5x22 + 8x2 x3 + 4x32.

10.15.x12 + 4x1x2 + 4x1x3 + 5x22 +12x2 x3 + 7x32.

10.16.x12 + 4x1x2 + 4x1x3 + 8x22 +16x2 x3 + 7x32.

10.17.x12 + 2x1x2 + 2x1x3 + 5x22 +10x2 x3 + 4x32.

10.18.x12 + 4x1x2 + 2x1x3 + 5x22 + 6x2 x3 + x32.

10.19.x12 + 4x1x3 + x22 + 2x2 x3 + 4x32.

10.20.x12 + 2x1x2 + 2x1x3 + 2x22 + 4x2 x3 + x32.

10.21.x12 + 4x1x2 + 4x1x3 + 4x2 x3 + 2x32.

10.22.4x12 + 4x1x2 + 4x1x3 3x22 + 2x32.

10.23.4x12 + 8x1x2 + 4x1x3 + x32.

10.24.4x12 + 8x1x2 + 4x1x3 + 3x22 4x32.

10.25.x12 + 4x1x2 + 4x1x3 + 3x22 + 4x2 x3 x32.

10.26.x12 + 4x1x2 + 4x1x3 x32.

10.27.x12 + 2x1x2 + 2x1x3 3x22 6x2 x3 4x32.

10.28.x12 + 4x1x2 + 2x1x3 + 3x22 + 2x2 x3 x32.

10.29.x12 + 4x1x2 x22 2x2 x3 + 2x32.

10.30.x12 + 2x1x2 + 2x1x3 x32.

10.31.x12 + 2x1x2 + 2x1x3 + 2x22 + 4x2 x3 + 3x32.

Задача 11. Привести квадратичную форму к каноническому виду ортогональным

преобразованием.

11.1.4x22 3x32 + 4x1x2 4x1x3 + 8x2 x3.

11.2.4x12 + 4x22 + x32 2x1x2 + 23x2 x3.

11.3.2x12 + 2x22 + 2x32 + 8x1x2 + 8x1x3 8x2 x3.

11.4.2x12 + 9x22 + 2x32 4x1x2 + 4x2 x3.

11.5.4x12 4x22 + 2x32 4x1x2 + 8x1x3 8x2 x3.

11.6.x12 + x22 + 4x32 + 2x1x2 23x2 x3.

11.7.4x12 + 4x22 + x32 + 2x1x2 4x1x3 + 4x2 x3.

 

3x2

+ x2

3

x2

+ 2

 

 

x x +

 

 

11.8.

3x x

3x x .

 

 

1

2

2

3

 

1

2

1

3

2

3

11.9.x12 x22 3x32 2x1x2 6x1x3 + 6x2 x3.

11.10.x12 7x22 + x32 4x1x2 2x1x3 4x2 x3.

11.11.

5

2

x2

+

5

 

2

x2

+

3

 

2

x2

+

2

x x

+ x x

+ x x .

 

 

 

 

 

 

 

 

 

 

4

1

 

 

4

2

 

 

2

3

 

2

1

2

1

3

2

3

11.12.3x12 7x22 + 3x32 + 8x1x2 8x1x3 8x2 x3.

11.13.x12 + 5x22 + x32 4x1x2 + 52x1x3 + 2x2 x3.

11.14.

x2

+ x2

+ x2

4

x x

8

 

2

x x .

 

 

 

 

 

1

2

3

3

1

2

 

3

2

3

11.15.2x12 + 2x22 2x32 4x1x2 + 52x1x3 + 2x2 x3.

11.16.(12)x12 + 5x22 (12)x32 4x1x2 + 3x1x3 + 4x2 x3.

11.17.x12 + x22 x32 4x1x3 + 4x2 x3.

11.18.2x12 + 2x22 2x32 + 4x1x2 6x1x3 + 4x2 x3.

11.19.2x12 + 3x22 + 2x32 8x1x2 42x1x3 + 22x2 x3.

11.20.4x12 + x22 4x32 + 4x1x2 4x1x3 + 4x2 x3.

11.21.10x12 +14x22 + 7x32 10x1x2 2x1x3 52x2 x3.

11.22.(32)x12 5x22 + (32)x32 + 4x1x2 x1x3 4x2 x3.

11.23.x12 + x22 + 2x32 + 4x1x2 + 22x1x3 22x2 x3.

11.24.2x22 3x32 23x1x2 4x1x3 + 43x2 x3.

11.25. x2

+ x2

+ x2

+

4

x x

 

+

8

 

2

x x .

 

 

 

 

 

1

2

3

3

1

2

 

 

3

2

3

11.26.x12 + x32 + 8x1x2 + 42x1x3 22x2 x3.

11.27.5x12 +13x22 + 5x32 + 4x1x2 + 8x2 x3.

11.28. 2x2 + 2x2 + 2x2 + 2 x x + 4 2 x x .

12 3 3 1 2 3 2 3

11.29.5x12 + 4x22 + 2x32 4x1x2 22x1x3 + 42x2 x3.

11.30.2x12 + 5x22 2x32 + 4x1x2 + 4x2 x3.

11.31.3x12 + 9x22 + 3x32 + 2x1x2 + 8x1x3 + 4x2 x3.

Задача 12. Исследовать кривую второго порядка и построить ее.

12.1.x2 y2 + 4xy + 2x 4y +1= 0.

12.2.2x2 + 2y2 2xy 2x 2y +1= 0.

12.3.4xy + 4x 4y = 0.

12.4.2x2 2y2 + 2xy 6x + 6y + 3 = 0.

12.5.3x2 3y2 + 4xy 6x + 4y + 2 = 0.

12.6.2xy 2x 2y +1= 0.

12.7.x2 y2 4xy 4x 2y + 2 = 0.

12.8.4x2 4y2 + 2xy +10x 10y +1= 0.

12.9.4xy + 4x 4y 2 = 0.

12.10.x2 + y2 + 2xy 8x 8y +1= 0.

12.11.x2 + y2 + 4xy 8x 4y +1= 0.

12.12.x2 + y2 2xy 2x + 2y 7 = 0.

12.13.2xy + 2x + 2y 3 = 0.

12.14.4x2 + 4y2 + 2xy +12x +12y +1= 0.

12.15.3x2 + 3y2 + 4xy + 8x +12y +1= 0.

12.16.x2 + y2 8xy 20x + 20y +1= 0.

12.17.3x2 + 3y2 2xy 6x + 2y +1= 0.

12.18.4xy + 4x + 4y +1= 0.

12.19.3x2 + 3y2 4xy + 6x 4y 7 = 0.

12.20.4xy 4x + 4y + 6 = 0.

12.21.5x2 + 5y2 2xy +10x 2y +1= 0.

12.22.2x2 + 2y2 + 4xy + 8x + 8y +1= 0.

12.23.x2 y2 + 2xy + 2x 2y +1= 0.

12.24.2x2 + 2y2 4xy 8x + 8y +1= 0.

12.25.3x2 + 3y2 + 2xy 12x 4y +1= 0.

12.26.4xy + 8x + 8y +1= 0.

12.27.2x2 + 2y2 2xy + 6x 6y 6 = 0.

12.28.x2 + y2 + 4xy + 4x + 2y 5 = 0.

12.29.4xy + 4x 4y + 4 = 0.

12.30.3x2 + 3y2 4xy + 4x + 4y +1= 0.

12.31.x2 + y2 4xy + 4x 2y +1= 0.