y = 0 and y = -4
The equation y^2+4y represents a parabola that is open upward. The general form of a quadratic function is y = ax^2 + bx + c.
In this case, the coefficient of the x^2 term is 1, the coefficient of the x term is 4, and the constant term is 0.
This equation can be factored as y(y+4) = 0.
This equation is satisfied by y = 0 and y = -4.
Therefore, the solutions of y^2+4y = 0 are y = 0 and y = -4.