Question 920724
 y= -(x+3)^2  -4
  y =-(x+3)*(x+3) -4
   y = -(x(x+3)+3(x-3) -4
    y = -(x^2+3x+3x+3*3)-4
          y= -(x^2+6x+9)-4
                  y= -X^2-6x-9-4
                   y =-x^2-6x-13
 solve the quadratic equation
 *[invoke quadratic "x", -1, -6, -13 ]