What is the vertex of y=x^2+3x+5 y=x2+3x+5? Algebra Quadratic Equations and Functions Quadratic Functions and Their Graphs 1 Answer Nghi N. Jan 10, 2016 Vertex (-3/2, 11/4)Vertex(−32,114) Explanation: x-coordinate of vertex: x = -b/(2a) = -3/2x=−b2a=−32 y-coordinate of vertex: y(-3/2) = (9/4) + 3(-3/2) + 5 = 9/4 - 9/2 + 5 = 11/4y(−32)=(94)+3(−32)+5=94−92+5=114 Vertex (-3/2, 11/4)Vertex(−32,114) 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+3y=x2−2x+3? How do you know if y=16-4x^2y=16−4x2 opens up or down? How do you find the x-coordinate of the vertex for the graph 4x^2+16x+12=04x2+16x+12=0? See all questions in Quadratic Functions and Their Graphs Impact of this question 2383 views around the world You can reuse this answer Creative Commons License