<span>x2 +8x +4y +4 = 0 </span>4y=<span> -x2 -8x -4</span>y = -.25*x^2 -2x -1 a = -.25b = -2c = -1 x position of vertex: h = -b / 2a h = 2 / 2*-.25h = 2 / -.5h = -4 y position of vertex: k = ah^2 + bh + ck = -.25*-4^2 + -2*-4 + -1k = -4 +8 -1k = 3 VERTEX = (-4, 3)************************************************************************** x value of focus =x value of vertex = -4 y value of focus =(1 (-b^2 -4ac)) / 4a
a = -.25 b = -2 c =-1 y value = (1 (-4 -4*-.25*-1)) / 4*-.25 y value = (1 (-4 -4*-.25*-1)) / -1 y value = (1 -4 +1) / -1y value = (-2 / -1)y value = 2 focus value = (-4, 2) Answer is the last one.
