2 - x^2 = 5x + 2;

-x^2 - 5x + 2 - 2 = 0;

-x^2 - 5x = 0;

x^2 + 5x = 0;

x(x + 5) = 0;

1) x = 0;

2) x + 5 = 0;

x = -5.