Question #fb6c4 Algebra Quadratic Equations and Functions Vertex Form of a Quadratic Equation 1 Answer EZ as pi Mar 9, 2017 The vertex is at #(-5,-16)# Explanation: #x^2 +10x +9# #= x^2 +10x +25 +9-25" "+-b^2/2# #= (x +5)^2 -16# This is in the form #(x+b)^2 +c# The vertex is at #(-5,-16)# Answer link Related questions What is the Vertex Form of a Quadratic Equation? How do you find the vertex form of a quadratic equation? How do you graph quadratic equations written in vertex form? How do you write #y+1=-2x^2-x# in the vertex form? How do you write the quadratic equation given #a=-2# and the vertex #(-5, 0)#? What is the quadratic equation containing (5, 2) and vertex (1, –2)? How do you find the vertex, x-intercept, y-intercept, and graph the equation #y=-4x^2+20x-24#? How do you write #y=9x^2+3x-10# in vertex form? What is the vertex of #y=-1/2(x-4)^2-7#? What is the vertex form of #y=x^2-6x+6#? See all questions in Vertex Form of a Quadratic Equation Impact of this question 1028 views around the world You can reuse this answer Creative Commons License