
Michelle P. answered 06/06/13
Patient, Creative, Math tutor ready to help!
Y=AX^2+Bx+C is the general form of a quadratic equation
to find the vertex use:-B/(2A) for the x coordinate. -5/(2*1)=-2.5= x
then plug x value into equation to get y coordinate:
y= (-2.5)^2+5(-2.5)+4=6.25+-12.5+4=-2.25=y
vertex is (x,y)
so vertex is (-2.5,-2.25)