Составить 10 неполных квадратных уравнений( с решением) .

1. 2x^2 + 2x = 0;

2x (x + 1) = 0;

x + 1 = 0;

x = -1;

2. x^2 - 4x = 0;

x (x - 4) = 0;

x - 4 = 0;

x = 4;

x = 0,5;

3. x^2 - x = 0;

x (x - 1) = 0;

x - 1 = 0;

x = 1;

4. x^2 + 5x = 0;

x (x + 5) = 0;

x + 5 = 0;

x = -5;

5. 2x^2 - 4x = 0;

2x (x - 2) = 0;

x - 2 = 0;

x = 2;

6. 4x^2 - 8x = 0;

4x (x - 2) = 0;

x - 2 = 0;

x = 2;

7. x^2 + x = 0;

x (x + 1) = 0;

x + 1 = 0;

x = -1;

8. x^2 + 4x = 0;

x (x + 4) = 0;

x + 4 = 0;

x = -4;

9. 2x^2 - 8x = 0;

2x (x - 4) = 0;

x - 4 = 0;

x = 4;

10. x^2 - 2x = 0;

x (x - 2) = 0;

x - 2 = 0;

x = 2;