What is the vertex of # y=-x^2-4x-3#? Algebra Quadratic Equations and Functions Quadratic Functions and Their Graphs 1 Answer Roella W. Dec 29, 2015 #(-2, 1)# Explanation: Rearrange the expression into the form #y = (x - a)^2 + b#. The vertex is then #(a, b)#. a is half the coefficient of x in the original equation. #y = -(x^2 + 4x +3)# #y = -((x+2)^2 -1)# #y = -(x +2)^2 + 1# Vertex is #(-2, 1)# Answer link Related questions What are the important features of the graphs of quadratic functions? What do quadratic function graphs look like? How do you find the x intercepts of a quadratic function? How do you determine the vertex and direction when given a quadratic function? How do you determine the range of a quadratic function? What is the domain of quadratic functions? How do you find the maximum or minimum of quadratic functions? How do you graph #y=x^2-2x+3#? How do you know if #y=16-4x^2# opens up or down? How do you find the x-coordinate of the vertex for the graph #4x^2+16x+12=0#? See all questions in Quadratic Functions and Their Graphs Impact of this question 2830 views around the world You can reuse this answer Creative Commons License