Система уравнений 1) 2x+3y^3=1 -x^2+2кореньy=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