Система уравнений

1) 2x+3y^3=1

-x^2+2 кореньy=2

2) y-x^2-x=0

3x-x^2-y=0

3) п*x+y=1

2x-п*y=1

2. y=3x-5;

x^2 + (3x-5) ^2 = 10x^2 - 30x + 25 = 25,

x^2 - 3x = 0,

x1 = 0, x2 = 3;

y1 = - 5, y2 = 4.

Ответ. (0; - 5), (3; 4).

3. y=-2x+4;

x^2 - 6x + 7 = - 2x + 4,

x^2 - 4x + 3 = 0,

x1 = 1, x2 = 3;

y1 = 2, y2 = - 2.

Ответ. (1; 2), (3; - 2).

4. y=2x-2;

x (2x - 2) - 3 (2x - 2) - 4x = - 10,

2x^2 - 2x - 6x + 6 - 4x + 10 = 0,

2x^2 - 12x + 16 = 0, |:2

x^2 - 6x + 8 = 0,

x1 = 2, x2 = 4;

y1 = 2, y2 = 6.

Ответ. (2; 2), (4:6). это пример